Plumb initiator out of Blink.

third_party/WebKit/Source/core/frame/RemoteFrameClient.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 RemoteFrameClient_h
 #define RemoteFrameClient_h
 
 #include "core/frame/FrameClient.h"
 #include "core/frame/FrameTypes.h"
 #include "core/loader/FrameLoaderTypes.h"
 #include "public/platform/WebFocusType.h"
 
 namespace blink {
 
+class Document;
 class IntRect;
 class LocalFrame;
 class MessageEvent;
 class ResourceRequest;
 class SecurityOrigin;
 
 class RemoteFrameClient : public FrameClient {
  public:
   ~RemoteFrameClient() override {}
 
-  virtual void navigate(const ResourceRequest&,
+  virtual void navigate(Document* originDocument,
+                        const ResourceRequest&,
                         bool shouldReplaceCurrentEntry) = 0;
   virtual void reload(FrameLoadType, ClientRedirectPolicy) = 0;
   virtual unsigned backForwardLength() = 0;
 
   // Forwards a postMessage for a remote frame.
   virtual void forwardPostMessage(MessageEvent*,
                                   PassRefPtr<SecurityOrigin> target,
                                   LocalFrame* sourceFrame) const = 0;
 
   virtual void frameRectsChanged(const IntRect& frameRect) = 0;
 
   virtual void updateRemoteViewportIntersection(
       const IntRect& viewportIntersection) = 0;
 
   virtual void advanceFocus(WebFocusType, LocalFrame* source) = 0;
 
   virtual void visibilityChanged(bool visible) = 0;
 };
 
 }  // namespace blink
 
 #endif  // RemoteFrameClient_h