Bug 1798396 - Remove appearance: -moz-win-glass, which is unused. r=tnikkel

This we don't need to uplift.

Differential Revision: https://phabricator.services.mozilla.com/D162535

layout/base/PresShell.cpp

@@ -5523,7 +5523,6 @@ PresShell::CanvasBackground PresShell::ComputeCanvasBackground() const {
   const nsStyleDisplay* disp = rootStyleFrame->StyleDisplay();
   StyleAppearance appearance = disp->EffectiveAppearance();
   if (rootStyleFrame->IsThemed(disp) &&
-      appearance != StyleAppearance::MozWinGlass &&
       appearance != StyleAppearance::MozWinBorderlessGlass) {
     // Ignore the CSS background-color if -moz-appearance is used and it is
     // not one of the glass values. (Windows 7 Glass has traditionally not

layout/base/nsLayoutUtils.cpp

@@ -6895,10 +6895,6 @@ nsTransparencyMode nsLayoutUtils::GetFrameTransparency(
   StyleAppearance appearance =
       aCSSRootFrame->StyleDisplay()->EffectiveAppearance();
 
-  if (appearance == StyleAppearance::MozWinGlass) {
-    return eTransparencyGlass;
-  }
-
   if (appearance == StyleAppearance::MozWinBorderlessGlass) {
     return eTransparencyBorderlessGlass;
   }

layout/painting/nsDisplayList.cpp

@@ -3682,8 +3682,7 @@ void nsDisplayThemedBackground::Init(nsDisplayListBuilder* aBuilder) {
     RegisterThemeGeometry(aBuilder, this, StyleFrame(), type);
   }
 
-  if (mAppearance == StyleAppearance::MozWinBorderlessGlass ||
-      mAppearance == StyleAppearance::MozWinGlass) {
+  if (mAppearance == StyleAppearance::MozWinBorderlessGlass) {
     aBuilder->SetGlassDisplayItem(this);
   }
 
@@ -3718,8 +3717,7 @@ nsRegion nsDisplayThemedBackground::GetOpaqueRegion(
 
 Maybe<nscolor> nsDisplayThemedBackground::IsUniform(
     nsDisplayListBuilder* aBuilder) const {
-  if (mAppearance == StyleAppearance::MozWinBorderlessGlass ||
-      mAppearance == StyleAppearance::MozWinGlass) {
+  if (mAppearance == StyleAppearance::MozWinBorderlessGlass) {
     return Some(NS_RGBA(0, 0, 0, 0));
   }
   return Nothing();

layout/style/test/test_non_content_accessible_values.html

@@ -89,7 +89,6 @@ const NON_CONTENT_ACCESSIBLE_VALUES = {
     "-moz-win-communications-toolbox",
     "-moz-win-media-toolbox",
     "-moz-win-browsertabbar-toolbox",
-    "-moz-win-glass",
     "-moz-win-borderless-glass",
     "-moz-win-exclude-glass",
     "-moz-mac-help-button",

servo/components/style/values/specified/box.rs

@@ -2011,9 +2011,6 @@ pub enum Appearance {
     MozWinMediaToolbox,
     #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
     MozWinBrowsertabbarToolbox,
-    /// Vista glass.
-    #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
-    MozWinGlass,
     #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
     MozWinBorderlessGlass,
     /// -moz-apperance style used in setting proper glass margins.

widget/nsIWidget.h

@@ -163,13 +163,11 @@ typedef void* nsNativeWidget;
  */
 
 enum nsTransparencyMode {
-  eTransparencyOpaque = 0,   // Fully opaque
-  eTransparencyTransparent,  // Parts of the window may be transparent
-  eTransparencyGlass,  // Transparent parts of the window have Vista AeroGlass
-                       // effect applied
-  eTransparencyBorderlessGlass  // As above, but without a border around the
-                                // opaque areas when there would otherwise be
-                                // one with eTransparencyGlass
+  eTransparencyOpaque = 0,      // Fully opaque
+  eTransparencyTransparent,     // Parts of the window may be transparent
+  eTransparencyBorderlessGlass  // Transparent parts of the window has windows 7
+                                // glass effect, without a border around opaque
+                                // areas.
   // If you add to the end here, you must update the serialization code in
   // WidgetMessageUtils.h
 };

widget/windows/CompositorWidgetParent.cpp

@@ -122,9 +122,7 @@ bool CompositorWidgetParent::HasGlass() const {
   MOZ_ASSERT(layers::CompositorThreadHolder::IsInCompositorThread() ||
              wr::RenderThread::IsInRenderThread());
 
-  nsTransparencyMode transparencyMode = mTransparencyMode;
-  return transparencyMode == eTransparencyGlass ||
-         transparencyMode == eTransparencyBorderlessGlass;
+  return mTransparencyMode == eTransparencyBorderlessGlass;
 }
 
 bool CompositorWidgetParent::IsHidden() const { return ::IsIconic(mWnd); }

widget/windows/InProcessWinCompositorWidget.cpp

@@ -296,10 +296,7 @@ bool InProcessWinCompositorWidget::GetWindowIsFullyOccluded() const {
 bool InProcessWinCompositorWidget::HasGlass() const {
   MOZ_ASSERT(layers::CompositorThreadHolder::IsInCompositorThread() ||
              wr::RenderThread::IsInRenderThread());
-
-  nsTransparencyMode transparencyMode = mTransparencyMode;
-  return transparencyMode == eTransparencyGlass ||
-         transparencyMode == eTransparencyBorderlessGlass;
+  return mTransparencyMode == eTransparencyBorderlessGlass;
 }
 
 void InProcessWinCompositorWidget::ClearTransparentWindow() {

widget/windows/nsNativeThemeWin.cpp

@@ -768,7 +768,6 @@ mozilla::Maybe<nsUXThemeClass> nsNativeThemeWin::GetThemeClass(
     case StyleAppearance::MozWindowButtonRestore:
     case StyleAppearance::MozWindowButtonBox:
     case StyleAppearance::MozWindowButtonBoxMaximized:
-    case StyleAppearance::MozWinGlass:
     case StyleAppearance::MozWinBorderlessGlass:
       return Some(eUXWindowFrame);
     default:
@@ -1370,7 +1369,6 @@ nsresult nsNativeThemeWin::GetThemePartAndState(nsIFrame* aFrame,
       return NS_OK;
     case StyleAppearance::MozWindowButtonBox:
     case StyleAppearance::MozWindowButtonBoxMaximized:
-    case StyleAppearance::MozWinGlass:
     case StyleAppearance::MozWinBorderlessGlass:
       aPart = -1;
       aState = 0;
@@ -1446,7 +1444,6 @@ nsNativeThemeWin::DrawWidgetBackground(gfxContext* aContext, nsIFrame* aFrame,
         // through here and call the theme library we'll get aero
         // basic bitmaps.
         return NS_OK;
-      case StyleAppearance::MozWinGlass:
       case StyleAppearance::MozWinBorderlessGlass:
         // Nothing to draw, this is the glass background.
         return NS_OK;
@@ -1847,7 +1844,6 @@ LayoutDeviceIntMargin nsNativeThemeWin::GetWidgetBorder(
       aAppearance == StyleAppearance::Separator ||
       aAppearance == StyleAppearance::MozWindowTitlebar ||
       aAppearance == StyleAppearance::MozWindowTitlebarMaximized ||
-      aAppearance == StyleAppearance::MozWinGlass ||
       aAppearance == StyleAppearance::MozWinBorderlessGlass)
     return result;  // Don't worry about it.
 
@@ -2131,7 +2127,6 @@ LayoutDeviceIntSize nsNativeThemeWin::GetMinimumWidgetSize(
     case StyleAppearance::Listbox:
     case StyleAppearance::Treeview:
     case StyleAppearance::Menuitemtext:
-    case StyleAppearance::MozWinGlass:
     case StyleAppearance::MozWinBorderlessGlass:
       return {};  // Don't worry about it.
     default:
@@ -2312,7 +2307,6 @@ nsNativeThemeWin::WidgetStateChanged(nsIFrame* aFrame,
       aAppearance == StyleAppearance::Tabpanels ||
       aAppearance == StyleAppearance::Tabpanel ||
       aAppearance == StyleAppearance::Separator ||
-      aAppearance == StyleAppearance::MozWinGlass ||
       aAppearance == StyleAppearance::MozWinBorderlessGlass) {
     *aShouldRepaint = false;
     return NS_OK;
@@ -2466,7 +2460,6 @@ nsITheme::Transparency nsNativeThemeWin::GetWidgetTransparency(
   }
 
   switch (aAppearance) {
-    case StyleAppearance::MozWinGlass:
     case StyleAppearance::MozWinBorderlessGlass:
     case StyleAppearance::ProgressBar:
     case StyleAppearance::Progresschunk:

widget/windows/nsWindow.cpp

@@ -3427,8 +3427,6 @@ void nsWindow::UpdateGlass() {
         margins.cxRightWidth += kGlassMarginAdjustment;
         margins.cyBottomHeight += kGlassMarginAdjustment;
       }
-      [[fallthrough]];
-    case eTransparencyGlass:
       policy = DWMNCRP_ENABLED;
       break;
     default:

widget/windows/nsWindow.h

@@ -542,8 +542,7 @@ class nsWindow final : public nsBaseWidget {
   HRGN ExcludeNonClientFromPaintRegion(HRGN aRegion);
   static const wchar_t* GetMainWindowClass();
   bool HasGlass() const {
-    return mTransparencyMode == eTransparencyGlass ||
-           mTransparencyMode == eTransparencyBorderlessGlass;
+    return mTransparencyMode == eTransparencyBorderlessGlass;
   }
   HWND GetOwnerWnd() const { return ::GetWindow(mWnd, GW_OWNER); }
   bool IsOwnerForegroundWindow() const {

widget/windows/nsWindowGfx.cpp

@@ -293,7 +293,6 @@ bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel) {
         // don't need to double buffer with anything but GDI
         BufferMode doubleBuffering = mozilla::layers::BufferMode::BUFFER_NONE;
         switch (mTransparencyMode) {
-          case eTransparencyGlass:
           case eTransparencyBorderlessGlass:
           default:
             // If we're not doing translucency, then double buffer