Convert BookmarkTabHelper to use the new navigation callbacks.

chrome/browser/ui/bookmarks/bookmark_tab_helper.h

Index: chrome/browser/ui/bookmarks/bookmark_tab_helper.h
diff --git a/chrome/browser/ui/bookmarks/bookmark_tab_helper.h b/chrome/browser/ui/bookmarks/bookmark_tab_helper.h
index 9727453f7e4398e685847174b159ef4c770b2631..69cab5401bdf4b6f7cb93982f7469723f510a227 100644
--- a/chrome/browser/ui/bookmarks/bookmark_tab_helper.h
+++ b/chrome/browser/ui/bookmarks/bookmark_tab_helper.h
@@ -85,12 +85,10 @@ class BookmarkTabHelper
                            const bookmarks::BookmarkNode* node) override;
 
   // Overridden from content::WebContentsObserver:
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) override;
-  void DidStartNavigationToPendingEntry(
-      const GURL& url,
-      content::ReloadType reload_type) override;
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
   void DidAttachInterstitialPage() override;
   void DidDetachInterstitialPage() override;