Backed out 3 changesets (bug 1551040) for Browser-chrome failures in browser/base/content/test/static/browser_parsable_css.js

Backed out changeset f48f479bcacd (bug 1551040)
Backed out changeset a6cd4b393999 (bug 1551040)
Backed out changeset 252cbf40efcb (bug 1551040)

dom/base/Document.h

@@ -3556,14 +3556,12 @@ class Document : public nsINode,
    * Defined inline in nsHTMLDocument.h
    */
   inline nsHTMLDocument* AsHTMLDocument();
-  inline const nsHTMLDocument* AsHTMLDocument() const;
 
   /**
    * Asserts IsSVGDocument, and can't return null.
    * Defined inline in SVGDocument.h
    */
   inline SVGDocument* AsSVGDocument();
-  inline const SVGDocument* AsSVGDocument() const;
 
   /*
    * Given a node, get a weak reference to it and append that reference to

dom/html/nsHTMLDocument.h

@@ -68,8 +68,6 @@ class nsHTMLDocument : public mozilla::dom::Document {
 
   nsContentList* GetExistingForms() const { return mForms; }
 
-  bool IsPlainText() const { return mIsPlainText; }
-
   // Returns whether an object was found for aName.
   bool ResolveName(JSContext* aCx, const nsAString& aName,
                    JS::MutableHandle<JS::Value> aRetval,
@@ -204,11 +202,6 @@ inline nsHTMLDocument* Document::AsHTMLDocument() {
   return static_cast<nsHTMLDocument*>(this);
 }
 
-inline const nsHTMLDocument* Document::AsHTMLDocument() const {
-  MOZ_ASSERT(IsHTMLOrXHTML());
-  return static_cast<const nsHTMLDocument*>(this);
-}
-
 }  // namespace dom
 }  // namespace mozilla
 

dom/svg/SVGDocument.h

@@ -43,11 +43,6 @@ inline SVGDocument* Document::AsSVGDocument() {
   return static_cast<SVGDocument*>(this);
 }
 
-inline const SVGDocument* Document::AsSVGDocument() const {
-  MOZ_ASSERT(IsSVGDocument());
-  return static_cast<const SVGDocument*>(this);
-}
-
 }  // namespace dom
 }  // namespace mozilla
 

layout/reftests/bugs/1551040.html

@@ -1 +0,0 @@
-<iframe src="1551040.txt"></iframe>

layout/reftests/bugs/1551040.txt

@@ -1 +0,0 @@
-Foobar

layout/reftests/bugs/reftest.list

@@ -2079,8 +2079,6 @@ skip-if(!asyncPan) == 1544895.html 1544895-ref.html
 == 1546856-2.html 1546856-ref.html
 == 1547759-1.html 1547759-1-ref.html
 == 1548809.html 1548809-ref.html
-test-pref(ui.systemUsesDarkTheme,1) != 1551040.txt 1551040.txt
-test-pref(ui.systemUsesDarkTheme,1) == 1551040.html 1551040.html
 != 1552789-1.html 1552789-ref-1.html
 pref(image.downscale-during-decode.enabled,true) skip-if(Android&&webrender) == 1553571-1.html 1553571-1-ref.html
 == 1558937-1.html 1558937-1-ref.html

layout/style/CSSMozDocumentRule.cpp

@@ -6,11 +6,8 @@
 
 #include "mozilla/dom/CSSMozDocumentRule.h"
 #include "mozilla/dom/CSSMozDocumentRuleBinding.h"
-
-#include "mozilla/dom/BrowsingContext.h"
 #include "mozilla/ServoBindings.h"
 #include "nsContentUtils.h"
-#include "nsHTMLDocument.h"
 
 namespace mozilla {
 namespace dom {
@@ -70,12 +67,6 @@ bool CSSMozDocumentRule::Match(const Document* aDoc, nsIURI* aDocURI,
       return nsContentUtils::IsPatternMatching(spec, regex, aDoc)
           .valueOr(false);
     }
-    case DocumentMatchingFunction::PlainTextDocument:
-      return aDoc->IsHTMLOrXHTML() && aDoc->AsHTMLDocument()->IsPlainText();
-    case DocumentMatchingFunction::UnobservableDocument: {
-      const BrowsingContext* bc = aDoc->GetBrowsingContext();
-      return bc && bc->IsTop() && !bc->HasOpener();
-    }
   }
   MOZ_ASSERT_UNREACHABLE("Unknown matching function");
   return false;

layout/style/DocumentMatchingFunction.h

@@ -20,8 +20,6 @@ enum class DocumentMatchingFunction {
   Domain,
   RegExp,
   MediaDocument,
-  PlainTextDocument,
-  UnobservableDocument,
 };
 
 }  // namespace css

layout/style/StyleSheet.cpp

@@ -1142,7 +1142,7 @@ already_AddRefed<StyleSheet> StyleSheet::CreateEmptyChildSheet(
 // (3) The stylesheet is a chrome stylesheet, since those can use
 //     -moz-bool-pref, which needs to access the pref service, which is not
 //     threadsafe.
-static bool AllowParallelParse(css::Loader& aLoader, URLExtraData* aUrlData) {
+static bool AllowParallelParse(css::Loader& aLoader, nsIURI* aSheetURI) {
   // If the browser is recording CSS errors, we need to use the sequential path
   // because the parallel path doesn't support that.
   Document* doc = aLoader.GetDocument();
@@ -1157,7 +1157,7 @@ static bool AllowParallelParse(css::Loader& aLoader, URLExtraData* aUrlData) {
   //
   // Note that UA stylesheets can also use -moz-bool-pref, but those are always
   // parsed sync.
-  if (aUrlData->ChromeRulesEnabled()) {
+  if (dom::IsChromeURI(aSheetURI)) {
     return false;
   }
 
@@ -1179,7 +1179,7 @@ RefPtr<StyleSheetParsePromise> StyleSheet::ParseSheet(
                               : StyleAllowImportRules::Yes;
   const bool shouldRecordCounters =
       aLoader.GetDocument() && aLoader.GetDocument()->GetStyleUseCounters();
-  if (!AllowParallelParse(aLoader, Inner().mURLData)) {
+  if (!AllowParallelParse(aLoader, GetSheetURI())) {
     UniquePtr<StyleUseCounters> counters =
         shouldRecordCounters ? Servo_UseCounters_Create().Consume() : nullptr;
 

layout/style/URLExtraData.cpp

@@ -27,7 +27,7 @@ void URLExtraData::Init() {
   sDummyChrome =
       new URLExtraData(baseURI.forget(), referrerInfo.forget(),
                        NullPrincipal::CreateWithoutOriginAttributes());
-  sDummyChrome->mChromeRulesEnabled = true;
+  sDummyChrome->mIsChrome = true;
 }
 
 /* static */

layout/style/URLExtraData.h

@@ -34,8 +34,7 @@ struct URLExtraData {
     // When we hold the URI data of a style sheet, referrer is always
     // equal to the sheet URI.
     nsCOMPtr<nsIURI> referrer = mReferrerInfo->GetOriginalReferrer();
-    mChromeRulesEnabled = referrer && (referrer->SchemeIs("chrome") ||
-                                       referrer->SchemeIs("resource"));
+    mIsChrome = referrer ? dom::IsChromeURI(referrer) : false;
   }
 
   URLExtraData(nsIURI* aBaseURI, nsIReferrerInfo* aReferrerInfo,
@@ -49,8 +48,6 @@ struct URLExtraData {
   nsIReferrerInfo* ReferrerInfo() const { return mReferrerInfo; }
   nsIPrincipal* Principal() const { return mPrincipal; }
 
-  bool ChromeRulesEnabled() const { return mChromeRulesEnabled; }
-
   static URLExtraData* Dummy() {
     MOZ_ASSERT(sDummy);
     return sDummy;
@@ -76,7 +73,8 @@ struct URLExtraData {
   nsCOMPtr<nsIReferrerInfo> mReferrerInfo;
   nsCOMPtr<nsIPrincipal> mPrincipal;
 
-  bool mChromeRulesEnabled;
+  // True if referrer is a chrome:// URI.
+  bool mIsChrome;
 
   static StaticRefPtr<URLExtraData> sDummy;
   static StaticRefPtr<URLExtraData> sDummyChrome;

layout/style/res/plaintext.css

@@ -17,16 +17,6 @@ html:not([dir]) pre { /* Not a UA sheet, so doesn't use :-moz-has-dir-attr */
   unicode-bidi: plaintext;
 }
 
-@-moz-document unobservable-document() {
-  @media (prefers-color-scheme: dark) {
-    :root {
-      /* in-content-page-{color, background} for dark theme. */
-      background: #2a2a2e;
-      color: rgb(249, 249, 250);
-    }
-  }
-}
-
 /* NOTE(emilio): For some reason some pages, mainly bing.com, load a bunch of
  * scripts in zero-size <object> elements, see bug 1548449.
  *

layout/style/test/test_condition_text.html

@@ -12,8 +12,6 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=814907
     @-moz-document media-document(image) {}
     @-moz-document media-document(plugin) {}
     @-moz-document media-document(all) {}
-    @-moz-document plain-text-document() {}
-    @-moz-document unobservable-document() {}
 
     @-moz-document url(http://www.example.com/) {}
     @-moz-document url('http://www.example.com/') {}
@@ -62,8 +60,6 @@ function runTest()
     "media-document(image)",
     "media-document(plugin)",
     "media-document(all)",
-    "plain-text-document()",
-    "unobservable-document()",
     "url(\"http://www.example.com/\")",
     "url(\"http://www.example.com/\")",
     "url(\"http://www.example.com/\")",

servo/components/style/parser.rs

@@ -140,7 +140,7 @@ impl<'a> ParserContext<'a> {
     /// Returns whether chrome-only rules should be parsed.
     #[inline]
     pub fn chrome_rules_enabled(&self) -> bool {
-        self.url_data.chrome_rules_enabled() || self.stylesheet_origin == Origin::User
+        self.url_data.is_chrome() || self.stylesheet_origin == Origin::User
     }
 
     /// Whether we're in a user-agent stylesheet or chrome rules are enabled.

servo/components/style/selector_parser.rs

@@ -75,7 +75,7 @@ impl<'a> SelectorParser<'a> {
     /// Whether we're parsing selectors in a stylesheet that has chrome
     /// privilege.
     pub fn chrome_rules_enabled(&self) -> bool {
-        self.url_data.map_or(false, |d| d.chrome_rules_enabled()) || self.stylesheet_origin == Origin::User
+        self.url_data.map_or(false, |d| d.is_chrome()) || self.stylesheet_origin == Origin::User
     }
 }
 

servo/components/style/stylesheets/document_rule.rs

@@ -110,13 +110,6 @@ pub enum DocumentMatchingFunction {
     /// Matching function for a media document.
     #[css(function)]
     MediaDocument(MediaDocumentKind),
-    /// Matching function for a plain-text document.
-    #[css(function)]
-    PlainTextDocument(()),
-    /// Matching function for a document that can be observed by other content
-    /// documents.
-    #[css(function)]
-    UnobservableDocument(()),
 }
 
 macro_rules! parse_quoted_or_unquoted_string {
@@ -168,21 +161,6 @@ impl DocumentMatchingFunction {
                     Ok(DocumentMatchingFunction::MediaDocument(kind))
                 })
             },
-
-            "plain-text-document" => {
-                input.parse_nested_block(|input| {
-                    input.expect_exhausted()?;
-                    Ok(DocumentMatchingFunction::PlainTextDocument(()))
-                })
-            },
-
-            "unobservable-document" => {
-                input.parse_nested_block(|input| {
-                    input.expect_exhausted()?;
-                    Ok(DocumentMatchingFunction::UnobservableDocument(()))
-                })
-            },
-
             _ => {
                 Err(location.new_custom_error(
                     StyleParseErrorKind::UnexpectedFunction(function.clone())
@@ -206,8 +184,6 @@ impl DocumentMatchingFunction {
             DocumentMatchingFunction::MediaDocument(_) => {
                 GeckoDocumentMatchingFunction::MediaDocument
             },
-            DocumentMatchingFunction::PlainTextDocument(..) => GeckoDocumentMatchingFunction::PlainTextDocument,
-            DocumentMatchingFunction::UnobservableDocument(..) => GeckoDocumentMatchingFunction::UnobservableDocument,
         };
 
         let pattern = nsCStr::from(match *self {
@@ -221,8 +197,6 @@ impl DocumentMatchingFunction {
                 MediaDocumentKind::Plugin => "plugin",
                 MediaDocumentKind::Video => "video",
             },
-            DocumentMatchingFunction::PlainTextDocument(()) |
-            DocumentMatchingFunction::UnobservableDocument(()) => "",
         });
         unsafe { Gecko_DocumentRule_UseForPresentation(device.document(), &*pattern, func) }
     }
@@ -279,9 +253,10 @@ impl DocumentCondition {
 
     #[cfg(feature = "gecko")]
     fn allowed_in(&self, context: &ParserContext) -> bool {
+        use crate::stylesheets::Origin;
         use static_prefs::pref;
 
-        if context.in_ua_or_chrome_sheet() {
+        if context.stylesheet_origin != Origin::Author {
             return true;
         }
 

servo/components/style/stylesheets/mod.rs

@@ -156,8 +156,8 @@ impl UrlExtraData {
 
     /// True if this URL scheme is chrome.
     #[inline]
-    pub fn chrome_rules_enabled(&self) -> bool {
-        self.as_ref().mChromeRulesEnabled
+    pub fn is_chrome(&self) -> bool {
+        self.as_ref().mIsChrome
     }
 
     /// Create a reference to this `UrlExtraData` from a reference to pointer.
@@ -215,7 +215,7 @@ impl fmt::Debug for UrlExtraData {
 
         formatter
             .debug_struct("URLExtraData")
-            .field("chrome_rules_enabled", &self.chrome_rules_enabled())
+            .field("is_chrome", &self.is_chrome())
             .field(
                 "base",
                 &DebugURI(self.as_ref().mBaseURI.raw::<structs::nsIURI>()),

servo/components/style_traits/values.rs

@@ -118,16 +118,6 @@ where
     }
 }
 
-impl ToCss for () {
-    #[inline]
-    fn to_css<W>(&self, _: &mut CssWriter<W>) -> fmt::Result
-    where
-        W: Write,
-    {
-        Ok(())
-    }
-}
-
 /// A writer tailored for serialising CSS.
 ///
 /// Coupled with SequenceWriter, this allows callers to transparently handle

toolkit/themes/shared/in-content/common.inc.css

@@ -104,10 +104,9 @@
 
 @media (prefers-color-scheme: dark) {
   :root {
-    /* Keep these in sync with layout/base/PresShell.cpp, and plaintext.css */
+    /* Keep this in sync with layout/base/PresShell.cpp! */
     --in-content-page-background: #2A2A2E;
     --in-content-page-color: rgb(249, 249, 250);
-
     --in-content-text-color: var(--in-content-page-color);
     --in-content-deemphasized-text: var(--grey-40);
     --in-content-box-background: #202023;