cc: Refactor content scale/bounds into draw properties

cc/layer_tree_host_common_unittest.cc

Index: cc/layer_tree_host_common_unittest.cc
diff --git a/cc/layer_tree_host_common_unittest.cc b/cc/layer_tree_host_common_unittest.cc
index 15776469e6911b7405d9179195c8d3e60451b0b2..df7b717bd5febba011a5dec949b2958591b9b799 100644
--- a/cc/layer_tree_host_common_unittest.cc
+++ b/cc/layer_tree_host_common_unittest.cc
@@ -2408,12 +2408,12 @@ TEST(LayerTreeHostCommonTest, verifyDrawableAndVisibleContentRectsInHighDPI)
     setLayerPropertiesForTesting(child3.get(), identityMatrix, identityMatrix, gfx::PointF(0, 0), gfx::PointF(125, 125), gfx::Size(50, 50), false);
 
     const double deviceScaleFactor = 2;
-    root->setContentsScale(deviceScaleFactor);
-    renderSurface1->setContentsScale(deviceScaleFactor);
-    renderSurface2->setContentsScale(deviceScaleFactor);
-    child1->setContentsScale(deviceScaleFactor);
-    child2->setContentsScale(deviceScaleFactor);
-    child3->setContentsScale(deviceScaleFactor);
+    root->updateContentsScale(deviceScaleFactor);
+    renderSurface1->updateContentsScale(deviceScaleFactor);
+    renderSurface2->updateContentsScale(deviceScaleFactor);
+    child1->updateContentsScale(deviceScaleFactor);
+    child2->updateContentsScale(deviceScaleFactor);
+    child3->updateContentsScale(deviceScaleFactor);
 
     root->setMasksToBounds(true);
     renderSurface1->setForceRenderSurface(true);
@@ -3978,9 +3978,15 @@ class NoScaleContentLayer : public ContentLayer
 public:
     static scoped_refptr<NoScaleContentLayer> create(ContentLayerClient* client) { return make_scoped_refptr(new NoScaleContentLayer(client)); }
 
-    virtual gfx::Size contentBounds() const OVERRIDE { return bounds(); }
-    virtual float contentsScaleX() const OVERRIDE { return 1.0; }
-    virtual float contentsScaleY() const OVERRIDE { return 1.0; }
+    virtual void didUpdateBounds() OVERRIDE
+    {
+        Layer::didUpdateBounds();
+    }
+
+    virtual void updateContentsScale(float idealContentsScale) OVERRIDE
+    {
+        Layer::updateContentsScale(idealContentsScale);
+    }
 
 protected:
     explicit NoScaleContentLayer(ContentLayerClient* client) : ContentLayer(client) { }
@@ -4534,10 +4540,10 @@ TEST(LayerTreeHostCommonTest, verifyRenderSurfaceTransformsInHighDPI)
     int dummyMaxTextureSize = 512;
 
     const double deviceScaleFactor = 1.5;
-    parent->setContentsScale(deviceScaleFactor);
-    child->setContentsScale(deviceScaleFactor);
-    duplicateChildNonOwner->setContentsScale(deviceScaleFactor);
-    replica->setContentsScale(deviceScaleFactor);
+    parent->updateContentsScale(deviceScaleFactor);
+    child->updateContentsScale(deviceScaleFactor);
+    duplicateChildNonOwner->updateContentsScale(deviceScaleFactor);
+    replica->updateContentsScale(deviceScaleFactor);
 
     LayerTreeHostCommon::calculateDrawProperties(parent.get(), parent->bounds(), deviceScaleFactor, 1, dummyMaxTextureSize, false, renderSurfaceLayerList);
 
@@ -4617,10 +4623,10 @@ TEST(LayerTreeHostCommonTest, verifyRenderSurfaceTransformsInHighDPIAccurateScal
     int dummyMaxTextureSize = 512;
 
     const float deviceScaleFactor = 1.7f;
-    parent->setContentsScale(deviceScaleFactor);
-    child->setContentsScale(deviceScaleFactor);
-    duplicateChildNonOwner->setContentsScale(deviceScaleFactor);
-    replica->setContentsScale(deviceScaleFactor);
+    parent->updateContentsScale(deviceScaleFactor);
+    child->updateContentsScale(deviceScaleFactor);
+    duplicateChildNonOwner->updateContentsScale(deviceScaleFactor);
+    replica->updateContentsScale(deviceScaleFactor);
 
     LayerTreeHostCommon::calculateDrawProperties(parent.get(), parent->bounds(), deviceScaleFactor, 1, dummyMaxTextureSize, false, renderSurfaceLayerList);