Make load events in iframe elements work with OOPIF (Blink side).

public/web/WebRemoteFrame.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebRemoteFrame_h
 #define WebRemoteFrame_h
 
 #include "public/web/WebFrame.h"
 #include "public/web/WebSandboxFlags.h"
 
@@ skipping 17 matching lines @@
 
     // Set security origin replicated from another process.
     virtual void setReplicatedOrigin(const WebSecurityOrigin&) const = 0;
 
     // Set sandbox flags replicated from another process.
     virtual void setReplicatedSandboxFlags(WebSandboxFlags) const = 0;
 
     // Set frame name replicated from another process.
     virtual void setReplicatedName(const WebString&) const = 0;
 
+    virtual void DispatchLoadEventForFrameOwner() const = 0;
+
     virtual void didStartLoading() = 0;
     virtual void didStopLoading() = 0;
 };
 
 } // namespace blink
 
 #endif // WebRemoteFrame_h