Mozart: Improve tracing and backpressure.

services/gfx/compositor/graph/scene_content.cc

 // Copyright 2016 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 "services/gfx/compositor/graph/scene_content.h"
 
 #include <ostream>
 
 #include "base/logging.h"
 #include "services/gfx/compositor/graph/scene_def.h"
@@ skipping 12 matching lines @@
       nodes_(max_nodes) {}
 
 SceneContent::~SceneContent() {}
 
 bool SceneContent::MatchesVersion(uint32_t requested_version) const {
   return requested_version == mojo::gfx::composition::kSceneVersionNone ||
          requested_version == version_ ||
          version_ == mojo::gfx::composition::kSceneVersionNone;
 }
 
-void SceneContent::RecordPicture(const Snapshot* snapshot,
-                                 SkCanvas* canvas) const {
+void SceneContent::Paint(const Snapshot* snapshot, SkCanvas* canvas) const {
   const Node* root = GetRootNodeIfExists();
   if (root)
-    root->RecordPicture(this, snapshot, canvas);
+    root->Paint(this, snapshot, canvas);
 }
 
 bool SceneContent::HitTest(
     const Snapshot* snapshot,
     const SkPoint& scene_point,
     const SkMatrix44& global_to_scene_transform,
     mojo::gfx::composition::SceneHitPtr* out_scene_hit) const {
   DCHECK(snapshot);
   DCHECK(out_scene_hit);
 
@@ skipping 126 matching lines @@
 }
 
 scoped_refptr<const SceneContent> SceneContentBuilder::Build() {
   DCHECK(content_);
 
   const Node* root = FindNode(mojo::gfx::composition::kSceneRootNodeId);
   return !root || AddNode(root) ? std::move(content_) : nullptr;
 }
 
 }  // namespace compositor