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 17 matching lines @@
 void HeadsUpDisplayLayer::update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*)
 {
     const LayerTreeDebugState& debugState = layerTreeHost()->debugState();
     int maxTextureSize = layerTreeHost()->rendererCapabilities().maxTextureSize;
 
     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, static_cast<int>(layerTreeHost()->deviceViewportSize().width() / layerTreeHost()->deviceScaleFactor()));

[danakj, 2013/02/20 02:46:08]

split these "static_cast<>(dVS.width/lTH.dSF)" parts out into temp vars so they
get a name (deviceViewportInLayoutPixelsWidth|Height?) and can be reused in both
the if/else parts.

+        int height = std::min(maxTextureSize, static_cast<int>(layerTreeHost()->deviceViewportSize().height() / layerTreeHost()->deviceScaleFactor()));
         bounds = gfx::Size(width, height);
     } else {
         bounds = gfx::Size(256, 256);
-        matrix.Translate(layerTreeHost()->layoutViewportSize().width() - 256, 0);
+        matrix.Translate(static_cast<int>(layerTreeHost()->deviceViewportSize().width() / layerTreeHost()->deviceScaleFactor()) - 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