<webview>: Move PreHandleGestureEvent in chrome

content/browser/browser_plugin/browser_plugin_guest.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.
 
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
@@ skipping 1115 matching lines @@
                  MEDIA_DEVICE_INVALID_STATE,
                  scoped_ptr<MediaStreamUI>());
     return;
   }
 
   delegate_->RequestMediaAccessPermission(request, callback);
 }
 
 bool BrowserPluginGuest::PreHandleGestureEvent(
     WebContents* source, const blink::WebGestureEvent& event) {
-  return event.type == blink::WebGestureEvent::GesturePinchBegin ||
-      event.type == blink::WebGestureEvent::GesturePinchUpdate ||
-      event.type == blink::WebGestureEvent::GesturePinchEnd;
+  if (!delegate_)
+    return false;
+
+  return delegate_->PreHandleGestureEvent(source, event);
 }
 
 void BrowserPluginGuest::OnUpdateRect(
     const ViewHostMsg_UpdateRect_Params& params) {
   BrowserPluginMsg_UpdateRect_Params relay_params;
   relay_params.view_size = params.view_size;
   relay_params.scale_factor = params.scale_factor;
   relay_params.is_resize_ack = ViewHostMsg_UpdateRect_Flags::is_resize_ack(
       params.flags);
 
@@ skipping 33 matching lines @@
 void BrowserPluginGuest::OnImeCompositionRangeChanged(
       const gfx::Range& range,
       const std::vector<gfx::Rect>& character_bounds) {
   static_cast<RenderWidgetHostViewBase*>(
       web_contents()->GetRenderWidgetHostView())->ImeCompositionRangeChanged(
           range, character_bounds);
 }
 #endif
 
 }  // namespace content