Remove compositing trigger for CSS transitions

Source/core/rendering/compositing/CompositingReasonFinder.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/rendering/compositing/CompositingReasonFinder.h"
 
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "core/animation/ActiveAnimations.h"
@@ skipping 62 matching lines @@
         directReasons |= CompositingReasonPlugin;
     else if (requiresCompositingForFrame(renderer))
         directReasons |= CompositingReasonIFrame;
 
     if (requiresCompositingForBackfaceVisibilityHidden(renderer))
         directReasons |= CompositingReasonBackfaceVisibilityHidden;
 
     if (requiresCompositingForAnimation(renderer))
         directReasons |= CompositingReasonActiveAnimation;
 
-    if (requiresCompositingForTransition(renderer))
-        directReasons |= CompositingReasonTransitionProperty;
-
     if (requiresCompositingForFilters(renderer))
         directReasons |= CompositingReasonFilters;
 
     if (requiresCompositingForPosition(renderer, layer, 0, needToRecomputeCompositingRequirements))
         directReasons |= renderer->style()->position() == FixedPosition ? CompositingReasonPositionFixed : CompositingReasonPositionSticky;
 
     if (requiresCompositingForOverflowScrolling(layer))
         directReasons |= CompositingReasonOverflowScrollingTouch;
 
     if (requiresCompositingForOverflowScrollingParent(layer))
@@ skipping 70 matching lines @@
 }
 
 bool CompositingReasonFinder::requiresCompositingForAnimation(RenderObject* renderer) const
 {
     if (!(m_compositingTriggers & AnimationTrigger))
         return false;
 
     return shouldCompositeForActiveAnimations(*renderer);
 }
 
-bool CompositingReasonFinder::requiresCompositingForTransition(RenderObject* renderer) const
-{
-    if (!(m_compositingTriggers & AnimationTrigger))
-        return false;
-
-    if (Settings* settings = m_renderView.document().settings()) {
-        if (!settings->acceleratedCompositingForTransitionEnabled())
-            return false;
-    }
-
-    return renderer->style()->transitionForProperty(CSSPropertyOpacity)
-        || renderer->style()->transitionForProperty(CSSPropertyWebkitFilter)
-        || renderer->style()->transitionForProperty(CSSPropertyWebkitTransform);
-}
-
 bool CompositingReasonFinder::requiresCompositingForFilters(RenderObject* renderer) const
 {
     if (!(m_compositingTriggers & FilterTrigger))
         return false;
 
     return renderer->hasFilter();
 }
 
 bool CompositingReasonFinder::requiresCompositingForOverflowScrollingParent(const RenderLayer* layer) const
 {
@@ skipping 136 matching lines @@
 
     return true;
 }
 
 bool CompositingReasonFinder::requiresCompositingForOverflowScrolling(const RenderLayer* layer) const
 {
     return layer->needsCompositedScrolling();
 }
 
 }