Mozart: Improve tracing and backpressure.

services/gfx/compositor/graph/scene_content.h

Index: services/gfx/compositor/graph/scene_content.h
diff --git a/services/gfx/compositor/graph/scene_content.h b/services/gfx/compositor/graph/scene_content.h
index c78f5edff33ada43049d37a03489141d6aebe410..28ac6092a2c4b88cec739d1449f32393aa19d95d 100644
--- a/services/gfx/compositor/graph/scene_content.h
+++ b/services/gfx/compositor/graph/scene_content.h
@@ -59,8 +59,8 @@ class SceneContent : public base::RefCounted<SceneContent> {
   // Returns true if this content satisfies a request for the specified version.
   bool MatchesVersion(uint32_t requested_version) const;
 
-  // Called to record drawing commands from a snapshot.
-  void RecordPicture(const Snapshot* snapshot, SkCanvas* canvas) const;
+  // Paints the content of the scene to a recording canvas.
+  void Paint(const Snapshot* snapshot, SkCanvas* canvas) const;
 
   // Performs a hit test at the specified point.
   // The |scene_point| is the hit tested point in the scene's coordinate space.