Chromium compositor change implementing page-scale driven pinch-zoom.

cc/LayerChromium.h

 // Copyright 2010 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 LayerChromium_h
 #define LayerChromium_h
 
 #if USE(ACCELERATED_COMPOSITING)
 
@@ skipping 138 matching lines @@
     void setLayerScrollClient(WebKit::WebLayerScrollClient* layerScrollClient) { m_layerScrollClient = layerScrollClient; }
 
     void setDrawCheckerboardForMissingTiles(bool);
     bool drawCheckerboardForMissingTiles() const { return m_drawCheckerboardForMissingTiles; }
 
     bool forceRenderSurface() const { return m_forceRenderSurface; }
     void setForceRenderSurface(bool);
 
     IntSize scrollDelta() const { return IntSize(); }
 
-    float pageScaleDelta() const { return 1; }
+    void setImplTransform(const WebKit::WebTransformationMatrix&);
+    const WebKit::WebTransformationMatrix& implTransform() const { return m_implTransform; }
 
     void setDoubleSided(bool);
     bool doubleSided() const { return m_doubleSided; }
 
     void setPreserves3D(bool preserve3D) { m_preserves3D = preserve3D; }
     bool preserves3D() const { return m_preserves3D; }
 
     void setUseParentBackfaceVisibility(bool useParentBackfaceVisibility) { m_useParentBackfaceVisibility = useParentBackfaceVisibility; }
     bool useParentBackfaceVisibility() const { return m_useParentBackfaceVisibility; }
 
@@ skipping 198 matching lines @@
     WebKit::WebTransformationMatrix m_drawTransform;
     WebKit::WebTransformationMatrix m_screenSpaceTransform;
     bool m_drawTransformIsAnimating;
     bool m_screenSpaceTransformIsAnimating;
 
     // Uses target surface space.
     IntRect m_drawableContentRect;
     float m_contentsScale;
     bool m_boundsContainPageScale;
 
+    WebKit::WebTransformationMatrix m_implTransform;
+
     WebKit::WebAnimationDelegate* m_layerAnimationDelegate;
     WebKit::WebLayerScrollClient* m_layerScrollClient;
 };
 
 void sortLayers(Vector<RefPtr<LayerChromium> >::iterator, Vector<RefPtr<LayerChromium> >::iterator, void*);
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)
 
 #endif