Add fixed raster scale use counter histograms.

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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/trees/layer_tree_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1917 matching lines @@
 
 bool LayerTreeImpl::SmoothnessTakesPriority() const {
   return layer_tree_host_impl_->GetTreePriority() == SMOOTHNESS_TAKES_PRIORITY;
 }
 
 VideoFrameControllerClient* LayerTreeImpl::GetVideoFrameControllerClient()
     const {
   return layer_tree_host_impl_;
 }
 
+void LayerTreeImpl::SetFixedRasterScaleHasBlurryContent() {
+  layer_tree_host_impl_->set_fixed_raster_scale_has_blurry_content();
+}
+
+void LayerTreeImpl::SetFixedRasterScaleAttemptedToChangeScale() {
+  layer_tree_host_impl_->SetFixedRasterScaleAttemptedToChangeScale();
+}
+
 void LayerTreeImpl::SetPendingPageScaleAnimation(
     std::unique_ptr<PendingPageScaleAnimation> pending_animation) {
   pending_page_scale_animation_ = std::move(pending_animation);
 }
 
 std::unique_ptr<PendingPageScaleAnimation>
 LayerTreeImpl::TakePendingPageScaleAnimation() {
   return std::move(pending_page_scale_animation_);
 }
 
@@ skipping 141 matching lines @@
 }
 
 void LayerTreeImpl::ResetAllChangeTracking(PropertyTrees::ResetFlags flag) {
   layers_that_should_push_properties_.clear();
   for (auto* layer : *this)
     layer->ResetChangeTracking();
   property_trees_.ResetAllChangeTracking(flag);
 }
 
 }  // namespace cc