PlzNavigate: Invoke didStartProvisionalLoad() when the renderer initiates a navigation in startLoad(

third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple 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.
@@ skipping 387 matching lines @@
     m_webFrame->client()->didNavigateWithinPage(
         m_webFrame, WebHistoryItem(item),
         static_cast<WebHistoryCommitType>(commitType), contentInitiated);
 }
 
 void FrameLoaderClientImpl::dispatchWillCommitProvisionalLoad() {
   if (m_webFrame->client())
     m_webFrame->client()->willCommitProvisionalLoad(m_webFrame);
 }
 
-void FrameLoaderClientImpl::dispatchDidStartProvisionalLoad() {
-  if (m_webFrame->client())
-    m_webFrame->client()->didStartProvisionalLoad(m_webFrame);
+void FrameLoaderClientImpl::dispatchDidStartProvisionalLoad(
+    DocumentLoader* loader) {
+  if (m_webFrame->client()) {
+    m_webFrame->client()->didStartProvisionalLoad(
+        m_webFrame, WebDataSourceImpl::fromDocumentLoader(loader));
+  }
   if (WebDevToolsAgentImpl* devTools = devToolsAgent())
     devTools->didStartProvisionalLoad(m_webFrame->frame());
 }
 
 void FrameLoaderClientImpl::dispatchDidReceiveTitle(const String& title) {
   if (m_webFrame->client())
     m_webFrame->client()->didReceiveTitle(m_webFrame, title,
                                           WebTextDirectionLeftToRight);
 }
 
@@ skipping 578 matching lines @@
 KURL FrameLoaderClientImpl::overrideFlashEmbedWithHTML(const KURL& url) {
   return m_webFrame->client()->overrideFlashEmbedWithHTML(WebURL(url));
 }
 
 void FrameLoaderClientImpl::setHasReceivedUserGesture() {
   if (m_webFrame->client())
     m_webFrame->client()->setHasReceivedUserGesture();
 }
 
 }  // namespace blink