Add blink::WebInputEvent::IsPinchGestureEventType().

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.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/guest_view/mime_handler_view/mime_handler_view_guest.h"
 
 #include <utility>
 
 #include "base/strings/stringprintf.h"
 #include "components/guest_view/common/guest_view_constants.h"
@@ skipping 223 matching lines @@
     const content::ContextMenuParams& params) {
   if (delegate_)
     return delegate_->HandleContextMenu(web_contents(), params);
 
   return false;
 }
 
 bool MimeHandlerViewGuest::PreHandleGestureEvent(
     WebContents* source,
     const blink::WebGestureEvent& event) {
-  if (event.GetType() == blink::WebGestureEvent::kGesturePinchBegin ||
-      event.GetType() == blink::WebGestureEvent::kGesturePinchUpdate ||
-      event.GetType() == blink::WebGestureEvent::kGesturePinchEnd) {
+  if (blink::WebInputEvent::IsPinchGestureEventType(event.GetType())) {
     // If we're an embedded plugin we drop pinch-gestures to avoid zooming the
     // guest.
     return !is_full_page_plugin();
   }
   return false;
 }
 
 content::JavaScriptDialogManager*
 MimeHandlerViewGuest::GetJavaScriptDialogManager(
     WebContents* source) {
@@ skipping 40 matching lines @@
   }
 }
 
 base::WeakPtr<StreamContainer> MimeHandlerViewGuest::GetStream() const {
   if (!stream_)
     return base::WeakPtr<StreamContainer>();
   return stream_->GetWeakPtr();
 }
 
 }  // namespace extensions