Plumb initiator out of Blink.

third_party/WebKit/Source/core/frame/RemoteFrame.cpp

 // 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.
 
 #include "core/frame/RemoteFrame.h"
 
 #include "bindings/core/v8/WindowProxy.h"
 #include "bindings/core/v8/WindowProxyManager.h"
 #include "core/dom/RemoteSecurityContext.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 52 matching lines @@
 void RemoteFrame::navigate(const FrameLoadRequest& passedRequest) {
   FrameLoadRequest frameRequest(passedRequest);
 
   // The process where this frame actually lives won't have sufficient
   // information to determine correct referrer, since it won't have access to
   // the originDocument. Set it now.
   FrameLoader::setReferrerForFrameRequest(frameRequest);
 
   frameRequest.resourceRequest().setHasUserGesture(
       UserGestureIndicator::processingUserGesture());
-  client()->navigate(frameRequest.resourceRequest(),
+  // TODO(dcheng): Should this DCHECK() that originDocument() is not null?
+  client()->navigate(frameRequest.originDocument(),
+                     frameRequest.resourceRequest(),
                      frameRequest.replacesCurrentItem());
 }
 
 void RemoteFrame::reload(FrameLoadType frameLoadType,
                          ClientRedirectPolicy clientRedirectPolicy) {
   client()->reload(frameLoadType, clientRedirectPolicy);
 }
 
 void RemoteFrame::detach(FrameDetachType type) {
   m_lifecycle.advanceTo(FrameLifecycle::Detaching);
@@ skipping 81 matching lines @@
   FrameVector childrenToDetach;
   childrenToDetach.reserveCapacity(tree().childCount());
   for (Frame* child = tree().firstChild(); child;
        child = child->tree().nextSibling())
     childrenToDetach.push_back(child);
   for (const auto& child : childrenToDetach)
     child->detach(FrameDetachType::Remove);
 }
 
 }  // namespace blink