Add blink::WebInputEvent::IsPinchGestureEventType().

chrome/browser/ui/app_list/start_page_service.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/ui/app_list/start_page_service.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 177 matching lines @@
 
     new_tab_params.initiating_profile = profile_;
     chrome::Navigate(&new_tab_params);
 
     return new_tab_params.target_contents;
   }
 
   bool PreHandleGestureEvent(content::WebContents* /*source*/,
                              const blink::WebGestureEvent& event) override {
     // Disable pinch zooming on the start page web contents.
-    return event.GetType() == blink::WebGestureEvent::kGesturePinchBegin ||
-           event.GetType() == blink::WebGestureEvent::kGesturePinchUpdate ||
-           event.GetType() == blink::WebGestureEvent::kGesturePinchEnd;
+    return blink::WebInputEvent::IsPinchGestureEventType(event.GetType());
   }
 
 
  private:
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(StartPageWebContentsDelegate);
 };
 
 
@@ skipping 433 matching lines @@
 
   // Check for a new doodle.
   content::BrowserThread::PostDelayedTask(
       content::BrowserThread::UI, FROM_HERE,
       base::Bind(&StartPageService::FetchDoodleJson,
                  weak_factory_.GetWeakPtr()),
       recheck_delay);
 }
 
 }  // namespace app_list