Bug 1130892 - Allow vibrancy in popups from non-chrome prescontexts. r=roc

layout/base/nsDisplayList.cpp

@@ -582,7 +582,7 @@ nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame,
       mAllowMergingAndFlattening(true),
       mWillComputePluginGeometry(false),
       mInTransform(false),
-      mIsInRootChromeDocument(false),
+      mIsInChromePresContext(false),
       mSyncDecodeImages(false),
       mIsPaintingToWindow(false),
       mIsCompositingCheap(false),
@@ -590,7 +590,8 @@ nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame,
       mAncestorHasTouchEventHandler(false),
       mAncestorHasScrollEventHandler(false),
       mHaveScrollableDisplayPort(false),
-      mWindowDraggingAllowed(false)
+      mWindowDraggingAllowed(false),
+      mIsBuildingForPopup(nsLayoutUtils::IsPopup(aReferenceFrame))
 {
   MOZ_COUNT_CTOR(nsDisplayListBuilder);
   PL_InitArenaPool(&mPool, "displayListArena", 1024,
@@ -1015,8 +1016,7 @@ nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
 
   nsPresContext* pc = aReferenceFrame->PresContext();
   pc->GetDocShell()->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
-
-  mIsInRootChromeDocument = !IsInSubdocument() && pc->IsChrome();
+  mIsInChromePresContext = pc->IsChrome();
 }
 
 void
@@ -1032,7 +1032,7 @@ nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame)
   if (!mPresShellStates.IsEmpty()) {
     nsPresContext* pc = CurrentPresContext();
     pc->GetDocShell()->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
-    mIsInRootChromeDocument = !IsInSubdocument() && pc->IsChrome();
+    mIsInChromePresContext = pc->IsChrome();
   }
 }
 
@@ -2117,7 +2117,7 @@ static void
 RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
                       nsITheme::ThemeGeometryType aType)
 {
-  if (aBuilder->IsInRootChromeDocument() && !aBuilder->IsInTransform()) {
+  if (aBuilder->IsInRootChromeDocumentOrPopup() && !aBuilder->IsInTransform()) {
     nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
     nsRect borderBox(aFrame->GetOffsetTo(displayRoot), aFrame->GetSize());
     aBuilder->RegisterThemeGeometry(aType,
@@ -2257,7 +2257,7 @@ nsDisplayBackgroundImage::AppendBackgroundItemsToTop(nsDisplayListBuilder* aBuil
   if (isThemed) {
     nsITheme* theme = presContext->GetTheme();
     if (theme->NeedToClearBackgroundBehindWidget(aFrame->StyleDisplay()->mAppearance) &&
-        aBuilder->IsInRootChromeDocument() && !aBuilder->IsInTransform()) {
+        aBuilder->IsInRootChromeDocumentOrPopup() && !aBuilder->IsInTransform()) {
       bgItemList.AppendNewToTop(
         new (aBuilder) nsDisplayClearBackground(aBuilder, aFrame));
     }

layout/base/nsDisplayList.h

@@ -432,9 +432,13 @@ public:
 
   /**
    * Return true if we're currently building a display list for the root
-   * presshell which is the presshell of a chrome document.
+   * presshell which is the presshell of a chrome document, or if we're
+   * building the display list for a popup and have not entered a subdocument
+   * inside that popup.
    */
-  bool IsInRootChromeDocument() { return mIsInRootChromeDocument; }
+  bool IsInRootChromeDocumentOrPopup() {
+    return (mIsInChromePresContext || mIsBuildingForPopup) && !IsInSubdocument();
+  }
 
   /**
    * @return true if images have been set to decode synchronously.
@@ -911,7 +915,7 @@ private:
   // True when we're building a display list that's directly or indirectly
   // under an nsDisplayTransform
   bool                           mInTransform;
-  bool                           mIsInRootChromeDocument;
+  bool                           mIsInChromePresContext;
   bool                           mSyncDecodeImages;
   bool                           mIsPaintingToWindow;
   bool                           mIsCompositingCheap;
@@ -923,6 +927,7 @@ private:
   // which WantsAsyncScroll().
   bool                           mHaveScrollableDisplayPort;
   bool                           mWindowDraggingAllowed;
+  bool                           mIsBuildingForPopup;
 };
 
 class nsDisplayItem;