Chromium side of moving clearContextMenu from WebViewClient to WebFrameClient.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
===================================================================
--- content/renderer/render_view_impl.cc	(revision 255430)
+++ content/renderer/render_view_impl.cc	(working copy)
@@ -2123,9 +2123,11 @@
                                              anchor_in_root_view));
 }
 
+#if !defined(CLEAR_CONTEXT_MENU_ON_WEB_FRAME_CLIENT)
 void RenderViewImpl::clearContextMenu() {
   context_menu_node_.reset();
 }
+#endif
 
 void RenderViewImpl::setStatusText(const WebString& text) {
 }