Pass accurate contentsScale to LayerImpl.

cc/test/tiled_layer_test_common.cc

 // Copyright 2012 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 "cc/test/tiled_layer_test_common.h"
 
 using namespace cc;
 
@@ skipping 121 matching lines @@
 cc::LayerUpdater* FakeTiledLayer::updater() const
 {
     return m_fakeUpdater.get();
 }
 
 cc::IntSize FakeTiledLayerWithScaledBounds::contentBounds() const
 {
     return m_forcedContentBounds;
 }
 
+float FakeTiledLayerWithScaledBounds::contentsScaleX() const
+{
+    return static_cast<float>(m_forcedContentBounds.width()) / bounds().width();
+}
+
+float FakeTiledLayerWithScaledBounds::contentsScaleY() const
+{
+    return static_cast<float>(m_forcedContentBounds.height()) / bounds().height();
+}
+
+void FakeTiledLayerWithScaledBounds::setContentsScale(float)
+{
+    NOTREACHED();
+}
+
 } // namespace