Move showContextMenu from WebViewClient to WebFrameClient.

public/web/WebFrameClient.h

Index: public/web/WebFrameClient.h
diff --git a/public/web/WebFrameClient.h b/public/web/WebFrameClient.h
index 1fd36217f25b4a28f31d6302d5bcda9653dec15a..1683ad65531afd5defd002bbd13ba8b475ce4c9e 100644
--- a/public/web/WebFrameClient.h
+++ b/public/web/WebFrameClient.h
@@ -47,6 +47,9 @@
 #include "public/platform/WebURLRequest.h"
 #include <v8.h>
 
+// FIXME(jam): remove after roll
+#define SHOW_CONTEXT_MENU_ON_WEB_FRAME_CLIENT
+
 namespace blink {
 
 class WebApplicationCacheHost;
@@ -73,6 +76,7 @@ class WebURL;
 class WebURLLoader;
 class WebURLResponse;
 class WebWorkerPermissionClientProxy;
+struct WebContextMenuData;
 struct WebPluginParams;
 struct WebRect;
 struct WebSize;
@@ -221,6 +225,13 @@ public:
     virtual void didUpdateCurrentHistoryItem(WebFrame*) { }
 
 
+    // UI ------------------------------------------------------------------
+
+    // Shows a context menu with commands relevant to a specific element on
+    // the given frame. Additional context data is supplied.
+    virtual void showContextMenu(const WebContextMenuData&) { }
+
+
     // Low-level resource notifications ------------------------------------
 
     // An element will request a resource.