Remove a bunch of provisionalDataSource() usage.

chrome/renderer/chrome_render_frame_observer.h

 // Copyright 2013 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 CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_
 #define CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/timer/timer.h"
 #include "content/public/renderer/render_frame_observer.h"
@@ skipping 65 matching lines @@
 class ChromeRenderFrameObserver : public content::RenderFrameObserver,
                                   public PageInfoReceiver {
  public:
   explicit ChromeRenderFrameObserver(content::RenderFrame* render_frame);
   ~ChromeRenderFrameObserver() override;
 
  private:
   // RenderFrameObserver implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void DidFinishDocumentLoad() override;
-  void DidStartProvisionalLoad() override;
+  void DidStartProvisionalLoad(blink::WebDataSource* datasource) override;
   void DidFinishLoad() override;
   void DidCommitProvisionalLoad(bool is_new_navigation,
                                 bool is_same_page_navigation) override;
 
   // IPC handlers
   void OnSetIsPrerendering(bool is_prerendering);
   void OnRequestReloadImageForContextNode();
   void OnRequestThumbnailForContextNode(
       int thumbnail_min_area_pixels,
       const gfx::Size& thumbnail_max_size_pixels);
   void OnPrintNodeUnderContextMenu();
   void OnSetClientSidePhishingDetection(bool enable_phishing_detection);
   void OnAppBannerPromptRequest(int request_id,
                                 const std::string& platform);
   void OnAppBannerDebugMessageRequest(const std::string& message);
 
   // PageInfoReceiver implementation.
   void PageCaptured(base::string16* content, CaptureType capture_type) override;
 
   // Have the same lifetime as us.
   translate::TranslateHelper* translate_helper_;
   safe_browsing::PhishingClassifierDelegate* phishing_classifier_;
 
   PageInfo page_info_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderFrameObserver);
 };
 
 #endif  // CHROME_RENDERER_CHROME_RENDER_FRAME_OBSERVER_H_