Promote RenderLayers that have a transition on opacity, transform, or filter

Tools/DumpRenderTree/chromium/TestRunner/src/WebPreferences.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 98 matching lines @@
     editingBehavior = WebSettings::EditingBehaviorMac;
 #else
     editingBehavior = WebSettings::EditingBehaviorWin;
 #endif
 
     tabsToLinks = false;
     hyperlinkAuditingEnabled = false;
     acceleratedCompositingForVideoEnabled = false;
     acceleratedCompositingForFixedPositionEnabled = false;
     acceleratedCompositingForOverflowScrollEnabled = false;
+    acceleratedCompositingForTransitionEnabled = false;
     acceleratedCompositingEnabled = false;
     accelerated2dCanvasEnabled = false;
     forceCompositingMode = false;
     threadedHTMLParser = true;
     perTilePaintingEnabled = false;
     deferredImageDecodingEnabled = false;
     mediaPlaybackRequiresUserGesture = false;
     mockScrollbarsEnabled = false;
     cssCustomFilterEnabled = false;
     shouldRespectImageOrientation = false;
@@ skipping 46 matching lines @@
     settings->setEditingBehavior(editingBehavior);
     settings->setHyperlinkAuditingEnabled(hyperlinkAuditingEnabled);
     // LayoutTests were written with Safari Mac in mind which does not allow
     // tabbing to links by default.
     webView->setTabsToLinks(tabsToLinks);
     settings->setCaretBrowsingEnabled(caretBrowsingEnabled);
     settings->setAcceleratedCompositingEnabled(acceleratedCompositingEnabled);
     settings->setAcceleratedCompositingForVideoEnabled(acceleratedCompositingForVideoEnabled);
     settings->setAcceleratedCompositingForFixedPositionEnabled(acceleratedCompositingForFixedPositionEnabled);
     settings->setAcceleratedCompositingForOverflowScrollEnabled(acceleratedCompositingForOverflowScrollEnabled);
+    settings->setAcceleratedCompositingForTransitionEnabled(acceleratedCompositingForTransitionEnabled);
     settings->setFixedPositionCreatesStackingContext(acceleratedCompositingForFixedPositionEnabled);
     settings->setForceCompositingMode(forceCompositingMode);
     settings->setThreadedHTMLParser(threadedHTMLParser);
     settings->setAccelerated2dCanvasEnabled(accelerated2dCanvasEnabled);
     settings->setPerTilePaintingEnabled(perTilePaintingEnabled);
     settings->setDeferredImageDecodingEnabled(deferredImageDecodingEnabled);
     settings->setMediaPlaybackRequiresUserGesture(mediaPlaybackRequiresUserGesture);
     settings->setMockScrollbarsEnabled(mockScrollbarsEnabled);
     settings->setShouldRespectImageOrientation(shouldRespectImageOrientation);
     settings->setAsynchronousSpellCheckingEnabled(asynchronousSpellCheckingEnabled);
@@ skipping 18 matching lines @@
     settings->setPasswordEchoEnabled(false);
     settings->setSmartInsertDeleteEnabled(true);
 #ifdef WIN32
     settings->setSelectTrailingWhitespaceEnabled(true);
 #else
     settings->setSelectTrailingWhitespaceEnabled(false);
 #endif
 }
 
 }