Convert HandoffActiveURLObserver to use the new navigation callbacks.

chrome/browser/ui/cocoa/handoff_active_url_observer.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 CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_H_
 #define CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
@@ skipping 21 matching lines @@
   void OnBrowserSetLastActive(Browser* browser) override;
   void OnBrowserRemoved(Browser* browser) override;
 
   // TabStripModelObserver
   void ActiveTabChanged(content::WebContents* old_contents,
                         content::WebContents* new_contents,
                         int index,
                         int reason) override;
 
   // content::WebContentsObserver
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
 
   // Updates the active browser.
   void SetActiveBrowser(Browser* active_browser);
 
   // Makes this object start observing the WebContents, if it is not already
   // doing so. This method is idempotent.
   void StartObservingWebContents(content::WebContents* web_contents);
 
   // Makes this object stop observing the WebContents.
   void StopObservingWebContents();
 
   // Returns the active WebContents. May return nullptr.
   content::WebContents* GetActiveWebContents();
 
   // Instances of this class should be owned by their |delegate_|.
   HandoffActiveURLObserverDelegate* delegate_;
 
   // This pointer is always up to date, and points to the most recently
   // activated browser, or nullptr if no browsers exist.
   Browser* active_browser_;
 
   DISALLOW_COPY_AND_ASSIGN(HandoffActiveURLObserver);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_H_