Fix the position of context menu for BrowserPlugins inside OOPIF

content/browser/browser_plugin/browser_plugin_guest.h

Index: content/browser/browser_plugin/browser_plugin_guest.h
diff --git a/content/browser/browser_plugin/browser_plugin_guest.h b/content/browser/browser_plugin/browser_plugin_guest.h
index f035bd94705118df1b26076984de4ac17e997f33..505bd7c1e2eb447f015e6974459836317dc53e07 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -258,6 +258,9 @@ class CONTENT_EXPORT BrowserPluginGuest : public GuestHost,
     return can_use_cross_process_frames_;
   }
 
+  gfx::Point GetCoordinatesInEmbedderWebContents(
+      const gfx::Point& relative_point);
+
  protected:
 
   // BrowserPluginGuest is a WebContentsObserver of |web_contents| and