Add fixed raster scale use counter histograms.

cc/trees/proxy_common.cc

 // Copyright 2015 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/proxy_common.h"
 
 #include "cc/proto/begin_main_frame_and_commit_state.pb.h"
 #include "cc/trees/layer_tree_host.h"
 
 namespace cc {
 
 BeginMainFrameAndCommitState::BeginMainFrameAndCommitState()
-    : memory_allocation_limit_bytes(0), evicted_ui_resources(false) {}
+    : memory_allocation_limit_bytes(0),

[danakj, 2016/05/13 20:41:47]

while you're here... mind moving all this init sadness to the definitions to be
less sadness?

[vmpstr, 2016/05/13 21:17:10]

Done.

+      evicted_ui_resources(false),
+      has_fixed_raster_scale_blurry_content(false),
+      has_fixed_raster_scale_potential_performance_regression(false) {}
 
 BeginMainFrameAndCommitState::~BeginMainFrameAndCommitState() {}
 
 void BeginMainFrameAndCommitState::ToProtobuf(
     proto::BeginMainFrameAndCommitState* proto) const {
   proto->set_begin_frame_id(begin_frame_id);
   begin_frame_args.ToProtobuf(proto->mutable_begin_frame_args());
   scroll_info->ToProtobuf(proto->mutable_scroll_info());
   proto->set_memory_allocation_limit_bytes(memory_allocation_limit_bytes);
   proto->set_evicted_ui_resources(evicted_ui_resources);
+  proto->set_has_fixed_raster_scale_blurry_content(
+      has_fixed_raster_scale_blurry_content);
+  proto->set_has_fixed_raster_scale_potential_performance_regression(
+      has_fixed_raster_scale_potential_performance_regression);
 }
 
 void BeginMainFrameAndCommitState::FromProtobuf(
     const proto::BeginMainFrameAndCommitState& proto) {
   begin_frame_id = proto.begin_frame_id();
   begin_frame_args.FromProtobuf(proto.begin_frame_args());
   scroll_info.reset(new ScrollAndScaleSet());
   scroll_info->FromProtobuf(proto.scroll_info());
   memory_allocation_limit_bytes = proto.memory_allocation_limit_bytes();
   evicted_ui_resources = proto.evicted_ui_resources();
+  has_fixed_raster_scale_blurry_content =
+      proto.has_fixed_raster_scale_blurry_content();
+  has_fixed_raster_scale_potential_performance_regression =
+      proto.has_fixed_raster_scale_potential_performance_regression();
 }
 
 }  // namespace cc