Prepare for remote->local frame swap

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 187 matching lines @@
 #include "web/GeolocationClientProxy.h"
 #include "web/LocalFileSystemClient.h"
 #include "web/MIDIClientProxy.h"
 #include "web/NotificationPermissionClientImpl.h"
 #include "web/PageOverlay.h"
 #include "web/SharedWorkerRepositoryClientImpl.h"
 #include "web/TextFinder.h"
 #include "web/WebDataSourceImpl.h"
 #include "web/WebDevToolsAgentPrivate.h"
 #include "web/WebPluginContainerImpl.h"
+#include "web/WebRemoteFrameImpl.h"
 #include "web/WebViewImpl.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/HashMap.h"
 #include <algorithm>
 
 namespace blink {
 
 static int frameCount = 0;
 
 // Key for a StatsCounter tracking how many WebFrames are active.
@@ skipping 1578 matching lines @@
     UserGestureIndicator gestureIndicator(DefinitelyProcessingNewUserGesture);
     v8::HandleScope handleScope(toIsolate(frame()));
     v8::Local<v8::Value> result = frame()->script().executeScriptInMainWorldAndReturnValue(ScriptSourceCode(script));
     if (result.IsEmpty() || !result->IsString())
         return;
     String scriptResult = toCoreString(v8::Handle<v8::String>::Cast(result));
     if (!frame()->navigationScheduler().locationChangePending())
         frame()->loader().replaceDocumentWhileExecutingJavaScriptURL(scriptResult, ownerDocument.get());
 }
 
+void WebLocalFrameImpl::initializeToReplaceRemoteFrame(WebRemoteFrame* oldWebFrame)
+{
+    Frame* oldFrame = toCoreFrame(oldWebFrame);
+    m_frame = LocalFrame::create(&m_frameLoaderClientImpl, oldFrame->host(), new PlaceholderFrameOwner());

[dcheng, 2014/10/15 21:14:35]

Is PlaceholderFrameOwner the right one? Do we not bother enforcing any sandbox
flags, etc while the load is in progress?

[Nate Chapin, 2014/10/15 21:27:31]

I don't think we enforce them in the provisional state of the first real load,
but I'm not certian. Will look.

[Nate Chapin, 2014/10/16 21:45:56]

This function now creates the LocalFrame with a PlaceholderFrameOwner, then
immediately replaces it with the actual owner. This is because we can't create
the LocalFrame with a null FrameOwner (which would cause this to be the main
frame), nor the real frame owner (which would cause this to become the frame
owner's contentFrame() and perform the swap too soon).

+    m_frame->tree().setName(oldFrame->tree().name());
+    setParent(oldWebFrame->parent());
+    // We must call init() after m_frame is assigned because it is referenced
+    // during init(). Note that this may dispatch JS events; the frame may be
+    // detached after init() returns.
+    m_frame->init();
+}
+
 void WebLocalFrameImpl::sendPings(const WebNode& linkNode, const WebURL& destinationURL)
 {
     ASSERT(frame());
     const Node* node = linkNode.constUnwrap<Node>();
     if (isHTMLAnchorElement(node))
         toHTMLAnchorElement(node)->sendPings(destinationURL);
 }
 
 bool WebLocalFrameImpl::isLoading() const
 {
@@ skipping 101 matching lines @@
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
     invalidateScrollbar();
 }
 
 } // namespace blink