Set default synthetic gesture source type on aura to be touch event

content/browser/renderer_host/input/synthetic_gesture_target_aura.cc

 // Copyright 2013 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/input/synthetic_gesture_target_aura.h"
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
 #include "ui/aura/client/screen_position_client.h"
@@ skipping 130 matching lines @@
   ui::MouseEvent mouse_event(event_type, location, location, flags, flags);
 
   ui::EventDispatchDetails details =
       GetWindowEventDispatcher()->OnEventFromSource(&mouse_event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 SyntheticGestureParams::GestureSourceType
 SyntheticGestureTargetAura::GetDefaultSyntheticGestureSourceType() const {
-  return SyntheticGestureParams::MOUSE_INPUT;
+  return SyntheticGestureParams::TOUCH_INPUT;
 }
 
 bool SyntheticGestureTargetAura::SupportsSyntheticGestureSourceType(
     SyntheticGestureParams::GestureSourceType gesture_source_type) const {
   return gesture_source_type == SyntheticGestureParams::TOUCH_INPUT ||
       gesture_source_type == SyntheticGestureParams::MOUSE_INPUT;
 }
 
 int SyntheticGestureTargetAura::GetTouchSlopInDips() const {
   // - 1 because Aura considers a pointer to be moving if it has moved at least
@@ skipping 17 matching lines @@
 aura::client::ScreenPositionClient*
 SyntheticGestureTargetAura::GetScreenPositionClient() const {
   aura::Window* root_window = GetWindow()->GetRootWindow();
   aura::client::ScreenPositionClient* position_client =
       aura::client::GetScreenPositionClient(root_window);
   DCHECK(position_client);
   return position_client;
 }
 
 }  // namespace content