events: Change gesture-event handler in EventHandler to not return any values.

ui/views/widget/widget.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 "ui/views/widget/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/events/event.h"
@@ skipping 1146 matching lines @@
   return static_cast<internal::RootView*>(GetRootView())->
       DispatchTouchEvent(event);
 }
 
 ui::EventResult Widget::OnScrollEvent(ui::ScrollEvent* event) {
   ScopedEvent scoped(this, *event);
   return static_cast<internal::RootView*>(GetRootView())->
       DispatchScrollEvent(event);
 }
 
-ui::EventResult Widget::OnGestureEvent(ui::GestureEvent* event) {
+void Widget::OnGestureEvent(ui::GestureEvent* event) {
   ScopedEvent scoped(this, *event);
   switch (event->type()) {
     case ui::ET_GESTURE_TAP_DOWN:
       is_touch_down_ = true;
       // We explicitly don't capture here. Not capturing enables multiple
       // widgets to get tap events at the same time. Views (such as tab
       // dragging) may explicitly capture.
       break;
 
     case ui::ET_GESTURE_END:
       if (event->details().touch_points() == 1) {
         is_touch_down_ = false;
         if (ShouldReleaseCaptureOnMouseReleased())
           ReleaseCapture();
       }
       break;
 
     default:
       break;
   }
-  return static_cast<internal::RootView*>(GetRootView())->
-      DispatchGestureEvent(event);
+  static_cast<internal::RootView*>(GetRootView())->DispatchGestureEvent(event);
 }
 
 bool Widget::ExecuteCommand(int command_id) {
   return widget_delegate_->ExecuteWindowsCommand(command_id);
 }
 
 InputMethod* Widget::GetInputMethodDirect() {
   return input_method_.get();
 }
 
@@ skipping 166 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views