Plumb initiator out of Blink.

content/renderer/render_frame_proxy.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 CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 #define CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 115 matching lines @@
 
   // Returns the widget used for the local frame root.
   RenderWidget* render_widget() { return render_widget_; }
 
   // blink::WebRemoteFrameClient implementation:
   void frameDetached(DetachType type) override;
   void forwardPostMessage(blink::WebLocalFrame* sourceFrame,
                           blink::WebRemoteFrame* targetFrame,
                           blink::WebSecurityOrigin target,
                           blink::WebDOMMessageEvent event) override;
-  void navigate(const blink::WebURLRequest& request,
+  void navigate(blink::WebLocalFrame* initiatorFrame,
+                const blink::WebURLRequest& request,
                 bool should_replace_current_entry) override;
   void frameRectsChanged(const blink::WebRect& frame_rect) override;
   void updateRemoteViewportIntersection(
       const blink::WebRect& viewportIntersection) override;
   void visibilityChanged(bool visible) override;
   void didChangeOpener(blink::WebFrame* opener) override;
   void advanceFocus(blink::WebFocusType type,
                     blink::WebLocalFrame* source) override;
   void frameFocused() override;
 
@@ skipping 47 matching lines @@
 
   RenderViewImpl* render_view_;
   RenderWidget* render_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameProxy);
 };
 
 }  // namespace
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_PROXY_H_