Remove code that is unused after ContextMenu cleanup

Source/WebKit/chromium/public/WebFrameClient.h

Index: Source/WebKit/chromium/public/WebFrameClient.h
diff --git a/Source/WebKit/chromium/public/WebFrameClient.h b/Source/WebKit/chromium/public/WebFrameClient.h
index 415fb592f30d570d9550eedf7b88f07a6edff175..a586cc4c7e175a426ebce467a54728a292727d06 100644
--- a/Source/WebKit/chromium/public/WebFrameClient.h
+++ b/Source/WebKit/chromium/public/WebFrameClient.h
@@ -140,10 +140,6 @@ public:
         WebFrame*, const WebURLRequest&, WebNavigationType,
         WebNavigationPolicy defaultPolicy, bool isRedirect) { return defaultPolicy; }
 
-    // Query if the specified request can be handled.
-    virtual bool canHandleRequest(
-        WebFrame*, const WebURLRequest& request) { return true; }
-
     // Returns an error corresponding to canHandledRequest() returning false.
     virtual WebURLError cannotHandleRequestError(
         WebFrame*, const WebURLRequest& request) { return WebURLError(); }