Merge 101221 - Reland 101111 - Only deliver extension messages to contexts that care.

chrome/renderer/extensions/event_bindings.cc

Index: chrome/renderer/extensions/event_bindings.cc
===================================================================
--- chrome/renderer/extensions/event_bindings.cc	(revision 103262)
+++ chrome/renderer/extensions/event_bindings.cc	(working copy)
@@ -392,12 +392,7 @@
     if (!extension_id.empty() && extension_id != (*it)->extension_id)
       continue;
 
-    WebFrame* context_frame = WebFrame::frameForContext((*it)->context);
-    if (!context_frame || !context_frame->view())
-      continue;
-
-    RenderView* context_render_view =
-        RenderView::FromWebView(context_frame->view());
+    RenderView* context_render_view = (*it)->GetRenderView();
     if (!context_render_view)
       continue;