cc: Apply the layer's initial CSS scale to the contentsScale to render text at the right resolution.

cc/layer_tree_host_common.h

 // Copyright 2011 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.
 
 #ifndef CCLayerTreeHostCommon_h
 #define CCLayerTreeHostCommon_h
 
 #include "base/memory/ref_counted.h"
 #include "cc/scoped_ptr_vector.h"
 #include "IntRect.h"
 #include "IntSize.h"
 #include <public/WebTransformationMatrix.h>
 #include <wtf/Vector.h>
 
 namespace cc {
 
 class CCLayerImpl;
 class CCLayerSorter;
 class LayerChromium;
 
 class CCLayerTreeHostCommon {
 public:
     static IntRect calculateVisibleRect(const IntRect& targetSurfaceRect, const IntRect& layerBoundRect, const WebKit::WebTransformationMatrix&);
 
-    static void calculateDrawTransforms(LayerChromium* rootLayer, const IntSize& deviceViewportSize, float deviceScaleFactor, int maxTextureSize, std::vector<scoped_refptr<LayerChromium> >& renderSurfaceLayerList);
-    static void calculateDrawTransforms(CCLayerImpl* rootLayer, const IntSize& deviceViewportSize, float deviceScaleFactor, CCLayerSorter*, int maxTextureSize, std::vector<CCLayerImpl*>& renderSurfaceLayerList);
+    static void calculateDrawTransforms(LayerChromium* rootLayer, const IntSize& deviceViewportSize, float deviceScaleFactor, float pageScaleFactor, int maxTextureSize, std::vector<scoped_refptr<LayerChromium> >& renderSurfaceLayerList);
+    static void calculateDrawTransforms(CCLayerImpl* rootLayer, const IntSize& deviceViewportSize, float deviceScaleFactor, float pageScaleFactor, CCLayerSorter*, int maxTextureSize, std::vector<CCLayerImpl*>& renderSurfaceLayerList);
 
     // Performs hit testing for a given renderSurfaceLayerList.
     static CCLayerImpl* findLayerThatIsHitByPoint(const IntPoint& viewportPoint, std::vector<CCLayerImpl*>& renderSurfaceLayerList);
 
     template<typename LayerType> static bool renderSurfaceContributesToTarget(LayerType*, int targetSurfaceLayerID);
 
     // Returns a layer with the given id if one exists in the subtree starting
     // from the given root layer (including mask and replica layers).
     template<typename LayerType> static LayerType* findLayerInSubtree(LayerType* rootLayer, int layerId);
 
@@ skipping 50 matching lines @@
     for (size_t i = 0; i < rootLayer->children().size(); ++i) {
         if (LayerType* found = findLayerInSubtree(getChildAsRawPtr(rootLayer->children(), i), layerId))
             return found;
     }
     return 0;
 }
 
 } // namespace cc
 
 #endif