Enable disabling WebCore::GraphicsContext in telemetry.

cc/layers/content_layer_client.h

Index: cc/layers/content_layer_client.h
diff --git a/cc/layers/content_layer_client.h b/cc/layers/content_layer_client.h
index 6a77dab532e29c9b70f6075e2bc3068edc247380..639f370b3ce6667bfaee9f1f6fc72dbef18796c2 100644
--- a/cc/layers/content_layer_client.h
+++ b/cc/layers/content_layer_client.h
@@ -20,7 +20,8 @@ class CC_EXPORT ContentLayerClient {
  public:
   virtual void PaintContents(SkCanvas* canvas,
                              const gfx::Rect& clip,
-                             gfx::RectF* opaque) = 0;
+                             gfx::RectF* opaque,
+                             bool disableContext = false) = 0;

[Sami, 2014/04/29 10:57:23]

hacker_style names please. Maybe the name could also be a little less opaque
like disable_graphics_context? Alternatively if that seems too verbose, let's
add a comment here saying what disable_context means.

[Stephen Chennney, 2014/04/29 20:30:45]

Done.

 
   // Called by the content layer during the update phase.
   // If the client paints LCD text, it may want to invalidate the layer.