Convert ChromeOmniboxNavigationObserver to use the new navigation callbacks.

chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h

Index: chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h
diff --git a/chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h b/chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h
index 7e02f57190414567462059823c66da552a9130a3..ac9ee192f6d6e7f7edf21cc8fef219c00bf444b9 100644
--- a/chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h
+++ b/chrome/browser/ui/omnibox/chrome_omnibox_navigation_observer.h
@@ -79,14 +79,10 @@ class ChromeOmniboxNavigationObserver : public OmniboxNavigationObserver,
                const content::NotificationDetails& details) override;
 
   // content::WebContentsObserver:
-  void DidStartNavigationToPendingEntry(
-      const GURL& url,
-      content::ReloadType reload_type) override;
-  void DidFailProvisionalLoad(content::RenderFrameHost* render_frame_host,
-                              const GURL& validated_url,
-                              int error_code,
-                              const base::string16& error_description,
-                              bool was_ignored_by_handler) override;
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
   void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) override;
   void WebContentsDestroyed() override;