Add blink::WebInputEvent::IsPinchGestureEventType().

chrome/browser/extensions/extension_view_host.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/extensions/extension_view_host.h"
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 190 matching lines @@
       return;
     }
   }
   UnhandledKeyboardEvent(source, event);
 }
 
 bool ExtensionViewHost::PreHandleGestureEvent(
     content::WebContents* source,
     const blink::WebGestureEvent& event) {
   // Disable pinch zooming.
-  return event.GetType() == blink::WebGestureEvent::kGesturePinchBegin ||
-         event.GetType() == blink::WebGestureEvent::kGesturePinchUpdate ||
-         event.GetType() == blink::WebGestureEvent::kGesturePinchEnd;
+  return blink::WebInputEvent::IsPinchGestureEventType(event.GetType());
 }
 
 content::ColorChooser* ExtensionViewHost::OpenColorChooser(
     WebContents* web_contents,
     SkColor initial_color,
     const std::vector<content::ColorSuggestion>& suggestions) {
   // Similar to the file chooser below, opening a color chooser requires a
   // visible <input> element to click on. Therefore this code only exists for
   // extensions with a view.
   return chrome::ShowColorChooser(web_contents, initial_color);
@@ skipping 79 matching lines @@
                                 const content::NotificationSource& source,
                                 const content::NotificationDetails& details) {
   DCHECK_EQ(type, extensions::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY);
   DCHECK(ExtensionSystem::Get(browser_context())
              ->runtime_data()
              ->IsBackgroundPageReady(extension()));
   LoadInitialURL();
 }
 
 }  // namespace extensions