Make RenderViewContextMenuViews::GetBrowserAcceleratorProvider() work for GuestViews.

chrome/browser/renderer_context_menu/render_view_context_menu.h

Index: chrome/browser/renderer_context_menu/render_view_context_menu.h
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu.h b/chrome/browser/renderer_context_menu/render_view_context_menu.h
index 0239d2c0e5caf6f64d8df44104567956f40c5c12..f8776dd496f77a59fa0458984356c8ae5defecf4 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu.h
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu.h
@@ -82,6 +82,7 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
 
  protected:
   Profile* GetProfile();
+  Browser* GetBrowser() const;
 
   // Returns a (possibly truncated) version of the current selection text
   // suitable for putting in the title of a menu item.
@@ -204,8 +205,6 @@ class RenderViewContextMenu : public RenderViewContextMenuBase {
   void PluginActionAt(const gfx::Point& location,
                       const blink::WebPluginAction& action);
 
-  Browser* GetBrowser() const;
-
   // Returns a list of registered ProtocolHandlers that can handle the clicked
   // on URL.
   ProtocolHandlerRegistry::ProtocolHandlerList GetHandlersForLinkUrl();