Convert BrowserPluginGuest to use the new navigation callbacks.

content/browser/browser_plugin/browser_plugin_guest.h

Index: content/browser/browser_plugin/browser_plugin_guest.h
diff --git a/content/browser/browser_plugin/browser_plugin_guest.h b/content/browser/browser_plugin/browser_plugin_guest.h
index dd23cd7ececdb2286cda84f99b0047f0328af896..0fcf99c8e8cd609235aad7b853e663878510a284 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -167,10 +167,7 @@ class CONTENT_EXPORT BrowserPluginGuest : public GuestHost,
   BrowserPluginGuestManager* GetBrowserPluginGuestManager() const;
 
   // WebContentsObserver implementation.
-  void DidCommitProvisionalLoadForFrame(
-      RenderFrameHost* render_frame_host,
-      const GURL& url,
-      ui::PageTransition transition_type) override;
+  void DidFinishNavigation(NavigationHandle* navigation_handle) override;
 
   void RenderViewReady() override;
   void RenderProcessGone(base::TerminationStatus status) override;