Add fixed raster scale use counter histograms.

cc/layers/layer.h

 // Copyright 2010 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.
 
 #ifndef CC_LAYERS_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 489 matching lines @@
 
   // Interactions with attached animations.
   gfx::ScrollOffset ScrollOffsetForAnimation() const;
   void OnFilterAnimated(const FilterOperations& filters);
   void OnOpacityAnimated(float opacity);
   void OnTransformAnimated(const gfx::Transform& transform);
   void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset);
   void OnTransformIsPotentiallyAnimatingChanged(bool is_animating);
   bool HasActiveAnimationForTesting() const;
 
+  void set_has_will_change_transform_hint(bool has_will_change) {
+    has_will_change_transform_hint_ = has_will_change;

[danakj, 2016/05/05 00:09:49]

Don't you need to SetNeedsCommit? (which will SetNeedsPushProperties)

[vmpstr, 2016/05/05 01:33:50]

Done.

+  }
+  bool has_will_change_transform_hint() const {
+    return has_will_change_transform_hint_;
+  }
+
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
   virtual ~Layer();
   Layer();
 
   // These SetNeeds functions are in order of severity of update:
   //
   // Called when this layer has been modified in some way, but isn't sure
   // that it needs a commit yet.  It needs CalcDrawProperties and UpdateLayers
@@ skipping 153 matching lines @@
   std::vector<std::unique_ptr<CopyOutputRequest>> copy_requests_;
 
   base::Closure did_scroll_callback_;
 
   PaintProperties paint_properties_;
 
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
+  bool has_will_change_transform_hint_;

[danakj, 2016/05/05 00:09:49]

group this with the other bools

[vmpstr, 2016/05/05 01:33:50]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_