Route selection bounds updates through WebLayerTreeView

public/web/WebRuntimeFeatures.h

Index: public/web/WebRuntimeFeatures.h
diff --git a/public/web/WebRuntimeFeatures.h b/public/web/WebRuntimeFeatures.h
index 6925f97f7c71f25d5095177642ca74a965570202..9f18564b099a805da1456a0413d307930a3337d5 100644
--- a/public/web/WebRuntimeFeatures.h
+++ b/public/web/WebRuntimeFeatures.h
@@ -46,6 +46,8 @@ public:
 
     BLINK_EXPORT static void enableDatabase(bool);
 
+    BLINK_EXPORT static void enableCompositedSelectionUpdates(bool);

[jdduke (slow), 2014/09/19 15:09:22]

Could we also add a |isCompositedSelectionUpdatesEnabled()| counterpart? Turns
out that will be useful downstream (see latest comments on
https://codereview.chromium.org/359033002/).

[jdduke (slow), 2014/09/19 15:14:01]

|areCompositedSelectionUpdatesEnabled()|? 

Or should the wording should be more like

|enableCompositedSelectionBounds()|
|areCompositedSelectionBoundsEnabled()|?

[trchen, 2014/09/19 21:08:42]

Acknowledged.
I think we should change it to singular form. It is not too late to do it yet.

+
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);
 
     BLINK_EXPORT static void enableEncryptedMedia(bool);