cc: Fix hudLayer size and paint rects scale for deviceScaleFactor != 1

cc/heads_up_display_layer_impl.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_impl.h"
 
 #include <limits>
 
 #include "base/stringprintf.h"
 #include "cc/debug_colors.h"
@@ skipping 293 matching lines @@
     paint.setAntiAlias(true);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(1);
 
     canvas->drawPath(path, paint);
 }
 
 void HeadsUpDisplayLayerImpl::drawDebugRects(SkCanvas* canvas, DebugRectHistory* debugRectHistory)
 {
     const std::vector<DebugRect>& debugRects = debugRectHistory->debugRects();
+    float rectScale = 1 / layerTreeHostImpl()->deviceScaleFactor();
+
+    canvas->save();
+    canvas->scale(rectScale, rectScale);
 
     for (size_t i = 0; i < debugRects.size(); ++i) {
         SkColor strokeColor = 0;
         SkColor fillColor = 0;
         float strokeWidth = 0;
 
         switch (debugRects[i].type) {
         case PaintRectType:
             strokeColor = DebugColors::PaintRectBorderColor();
             fillColor = DebugColors::PaintRectFillColor();
@@ skipping 35 matching lines @@
         SkRect skRect = SkRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height());
         SkPaint paint = createPaint();
         paint.setColor(fillColor);
         canvas->drawRect(skRect, paint);
 
         paint.setColor(strokeColor);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(SkFloatToScalar(strokeWidth));
         canvas->drawRect(skRect, paint);
     }
+
+    canvas->restore();
 }
 
 const char* HeadsUpDisplayLayerImpl::layerTypeAsString() const
 {
     return "HeadsUpDisplayLayer";
 }
 
 }  // namespace cc