Convert SearchTabHelper to use the new navigation callbacks.

chrome/browser/ui/search/search_tab_helper_unittest.cc

Index: chrome/browser/ui/search/search_tab_helper_unittest.cc
diff --git a/chrome/browser/ui/search/search_tab_helper_unittest.cc b/chrome/browser/ui/search/search_tab_helper_unittest.cc
index 6c6cd0d74cde9b21a6fc5040b438314d2351b426..d460edda953a260d60292ca1245dc0418b419ed7 100644
--- a/chrome/browser/ui/search/search_tab_helper_unittest.cc
+++ b/chrome/browser/ui/search/search_tab_helper_unittest.cc
@@ -283,16 +283,13 @@ class TabTitleObserver : public content::WebContentsObserver {
   base::string16 title_on_commit() { return title_on_commit_; }
 
  private:
-  void DidStartProvisionalLoadForFrame(
-      content::RenderFrameHost* /* render_frame_host */,
-      const GURL& /* validated_url */,
-      bool /* is_error_page */) override {
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override {
     title_on_start_ = web_contents()->GetTitle();
   }
 
-  void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& /* details */,
-      const content::FrameNavigateParams& /* params */) override {
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override {
     title_on_commit_ = web_contents()->GetTitle();
   }