Remove pinch zoom handling from the browser process

content/browser/renderer_host/render_widget_host_impl.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/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 1849 matching lines @@
     }
     view_->WheelEventAck(wheel_event.event, ack_result);
   }
 }
 
 void RenderWidgetHostImpl::OnGestureEventAck(
     const GestureEventWithLatencyInfo& event,
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(event.event, &event.latency);
 
-  if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED) {
-    if (delegate_->HandleGestureEvent(event.event))
-      ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
-  }
-
   if (view_)
     view_->GestureEventAck(event.event, ack_result);
 }
 
 void RenderWidgetHostImpl::OnTouchEventAck(
     const TouchEventWithLatencyInfo& event,
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(event.event, &event.latency);
 
   if (touch_emulator_ &&
@@ skipping 312 matching lines @@
 }
 #endif
 
 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return kN32_SkColorType;
 }
 
 }  // namespace content