compositor-worker: Introduce CompositorWorker.

public/web/WebRuntimeFeatures.h

Index: public/web/WebRuntimeFeatures.h
diff --git a/public/web/WebRuntimeFeatures.h b/public/web/WebRuntimeFeatures.h
index 06343d989fa07d49dc35c84aa712340bd22e74c4..9885782adfdf65671783680ef0a391864cacc8fe 100644
--- a/public/web/WebRuntimeFeatures.h
+++ b/public/web/WebRuntimeFeatures.h
@@ -54,6 +54,9 @@ public:
     BLINK_EXPORT static void enableCompositedSelectionUpdate(bool);
     BLINK_EXPORT static bool isCompositedSelectionUpdateEnabled();
 
+    BLINK_EXPORT static void enableCompositorWorker(bool);

[tkent, 2015/03/25 05:55:10]

Why do you need public functions?

[sadrul, 2015/03/25 06:13:07]

My understanding is this would allow us to turn the feature on using a
command-line flag from chrome. Is there a better way for doing this?

[tkent, 2015/03/25 06:15:05]

Usually these functions are unnecessary for a feature with status=experimental
because users can enable it by
chrome://flags/#enable-experimental-web-platform-features

[sadrul, 2015/03/25 06:26:37]

Ah, yes. That would be sufficient. Thanks. Removed these.

+    BLINK_EXPORT static bool isCompositorWorkerEnabled();
+
     BLINK_EXPORT static void enableDecodeToYUV(bool);
 
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);