Add canUpdateLayout & canHandleGestureEvent to WebViewClient.

content/renderer/render_view_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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 1809 matching lines @@
   }
 
   RenderWidget::show(policy);
 }
 
 void RenderViewImpl::onMouseDown(const WebNode& mouse_down_node) {
   for (auto& observer : observers_)
     observer.OnMouseDown(mouse_down_node);
 }
 
+bool RenderViewImpl::canHandleGestureEvent() {
+  return true;
+}
+
+bool RenderViewImpl::canUpdateLayout() {
+  return true;
+}
+
 void RenderViewImpl::didHandleGestureEvent(
     const WebGestureEvent& event,
     bool event_cancelled) {
   RenderWidget::didHandleGestureEvent(event, event_cancelled);
 
   if (!event_cancelled) {
     for (auto& observer : observers_)
       observer.DidHandleGestureEvent(event);
   }
 }
@@ skipping 873 matching lines @@
                             INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   }
 
   std::unique_ptr<InputEventAck> ack(
       new InputEventAck(InputEventAckSource::MAIN_THREAD, input_event->type(),
                         INPUT_EVENT_ACK_STATE_NOT_CONSUMED));
   OnInputEventAck(std::move(ack));
 }
 
 }  // namespace content