cc: fix HudLayer to be sized by device

cc/heads_up_display_layer.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 "cc/heads_up_display_layer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/heads_up_display_layer_impl.h"
 #include "cc/layer_tree_host.h"
 
@@ skipping 12 matching lines @@
 
 HeadsUpDisplayLayer::~HeadsUpDisplayLayer()
 {
 }
 
 void HeadsUpDisplayLayer::update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*)
 {
     const LayerTreeDebugState& debugState = layerTreeHost()->debugState();
     int maxTextureSize = layerTreeHost()->rendererCapabilities().maxTextureSize;
 
+    int deviceViewportInLayoutPixelsWidth = layerTreeHost()->deviceViewportSize().width() / layerTreeHost()->deviceScaleFactor();
+    int deviceViewportInLayoutPixelsHeight = layerTreeHost()->deviceViewportSize().height() / layerTreeHost()->deviceScaleFactor();
+
     gfx::Size bounds;
     gfx::Transform matrix;
     matrix.MakeIdentity();
 
     if (debugState.showPlatformLayerTree || debugState.showHudRects()) {
-        int width = std::min(maxTextureSize, layerTreeHost()->layoutViewportSize().width());
-        int height = std::min(maxTextureSize, layerTreeHost()->layoutViewportSize().height());
+        int width = std::min(maxTextureSize, deviceViewportInLayoutPixelsWidth);
+        int height = std::min(maxTextureSize, deviceViewportInLayoutPixelsHeight);
         bounds = gfx::Size(width, height);
     } else {
         bounds = gfx::Size(256, 256);
-        matrix.Translate(layerTreeHost()->layoutViewportSize().width() - 256, 0);
+        matrix.Translate(deviceViewportInLayoutPixelsWidth - 256, 0);
     }
 
     setBounds(bounds);
     setTransform(matrix);
 }
 
 bool HeadsUpDisplayLayer::drawsContent() const
 {
     return true;
 }
 
 scoped_ptr<LayerImpl> HeadsUpDisplayLayer::createLayerImpl(LayerTreeImpl* treeImpl)
 {
     return HeadsUpDisplayLayerImpl::create(treeImpl, m_layerId).PassAs<LayerImpl>();
 }
 
 }  // namespace cc