Add blink::WebInputEvent::IsPinchGestureEventType().

extensions/browser/app_window/app_web_contents_helper.cc

 // Copyright 2014 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 "extensions/browser/app_window/app_web_contents_helper.h"
 
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 15 matching lines @@
     : browser_context_(browser_context),
       extension_id_(extension_id),
       web_contents_(web_contents),
       app_delegate_(app_delegate) {
 }
 
 // static
 bool AppWebContentsHelper::ShouldSuppressGestureEvent(
     const blink::WebGestureEvent& event) {
   // Disable pinch zooming in app windows.
-  return event.GetType() == blink::WebGestureEvent::kGesturePinchBegin ||
-         event.GetType() == blink::WebGestureEvent::kGesturePinchUpdate ||
-         event.GetType() == blink::WebGestureEvent::kGesturePinchEnd;
+  return blink::WebInputEvent::IsPinchGestureEventType(event.GetType());
 }
 
 content::WebContents* AppWebContentsHelper::OpenURLFromTab(
     const content::OpenURLParams& params) const {
   // Don't allow the current tab to be navigated. It would be nice to map all
   // anchor tags (even those without target="_blank") to new tabs, but right
   // now we can't distinguish between those and <meta> refreshes or window.href
   // navigations, which we don't want to allow.
   // TOOD(mihaip): Can we check for user gestures instead?
   WindowOpenDisposition disposition = params.disposition;
@@ skipping 57 matching lines @@
       web_contents_, security_origin, type, extension);
 }
 
 const Extension* AppWebContentsHelper::GetExtension() const {
   return ExtensionRegistry::Get(browser_context_)
       ->enabled_extensions()
       .GetByID(extension_id_);
 }
 
 }  // namespace extensions