Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_touch_pointer.cc

 // Copyright 2015 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_touch_pointer.h"
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 
 namespace content {
 
@@ skipping 25 matching lines @@
                                  const base::TimeTicks& timestamp) {
   touch_event_.MovePoint(index, x, y);
 }
 
 void SyntheticTouchPointer::Release(int index,
                                     SyntheticGestureTarget* target,
                                     const base::TimeTicks& timestamp) {
   touch_event_.ReleasePoint(index);
 }
 
+SyntheticGestureParams::GestureSourceType SyntheticTouchPointer::SourceType()
+    const {
+  return SyntheticGestureParams::TOUCH_INPUT;
+}
+
 }  // namespace content