Move GetContextMenuNode from RenderView to RenderFrame.

android_webview/renderer/aw_content_renderer_client.cc

Index: android_webview/renderer/aw_content_renderer_client.cc
===================================================================
--- android_webview/renderer/aw_content_renderer_client.cc	(revision 255957)
+++ android_webview/renderer/aw_content_renderer_client.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "android_webview/common/url_constants.h"
 #include "android_webview/renderer/aw_key_systems.h"
 #include "android_webview/renderer/aw_permission_client.h"
+#include "android_webview/renderer/aw_render_frame_observer.h"
 #include "android_webview/renderer/aw_render_view_ext.h"
 #include "android_webview/renderer/print_web_view_helper.h"
 #include "base/message_loop/message_loop.h"
@@ -118,6 +119,7 @@
 void AwContentRendererClient::RenderFrameCreated(
     content::RenderFrame* render_frame) {
   new AwPermissionClient(render_frame);
+  new AwRenderFrameObserver(render_frame);
 
   // TODO(jam): when the frame tree moves into content and parent() works at
   // RenderFrame construction, simplify this by just checking parent().