Remove IsSynchronous API from NavigationHandle.

chrome/browser/extensions/api/web_navigation/web_navigation_api.cc

 // Copyright (c) 2012 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.
 
 // Implements the Chrome Extensions WebNavigation API.
 
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 250 matching lines @@
   if (old_host) {
     RenderFrameDeleted(old_host);
     navigation_state_.FrameHostDeleted(old_host);
   }
 
   navigation_state_.FrameHostCreated(new_host);
 }
 
 void WebNavigationTabObserver::DidStartNavigation(
     content::NavigationHandle* navigation_handle) {
-  if (navigation_handle->IsSynchronousNavigation() ||
+  if (navigation_handle->IsSamePage() ||
       !FrameNavigationState::IsValidUrl(navigation_handle->GetURL())) {
     return;
   }
 
   helpers::DispatchOnBeforeNavigate(navigation_handle);
 }
 
 void WebNavigationTabObserver::DidFinishNavigation(
     content::NavigationHandle* navigation_handle) {
   if (navigation_handle->HasCommitted() && !navigation_handle->IsErrorPage()) {
@@ skipping 280 matching lines @@
   return g_factory.Pointer();
 }
 
 void WebNavigationAPI::OnListenerAdded(const EventListenerInfo& details) {
   web_navigation_event_router_.reset(new WebNavigationEventRouter(
       Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions