Support multi-button press for synthetic mouse events

content/browser/renderer_host/input/synthetic_touch_driver.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_driver.h"
 
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 
 namespace content {
 
 SyntheticTouchDriver::SyntheticTouchDriver() {
   std::fill(index_map_.begin(), index_map_.end(), -1);
 }
 
 SyntheticTouchDriver::SyntheticTouchDriver(SyntheticWebTouchEvent touch_event)
     : touch_event_(touch_event) {
   std::fill(index_map_.begin(), index_map_.end(), -1);
 }
 
 SyntheticTouchDriver::~SyntheticTouchDriver() {}
 
 void SyntheticTouchDriver::DispatchEvent(SyntheticGestureTarget* target,
                                          const base::TimeTicks& timestamp) {
   touch_event_.setTimeStampSeconds(ConvertTimestampToSeconds(timestamp));
-  target->DispatchInputEventToPlatform(touch_event_);
+  if (touch_event_.type() != blink::WebInputEvent::Undefined)
+    target->DispatchInputEventToPlatform(touch_event_);
   touch_event_.ResetPoints();
 }
 
-void SyntheticTouchDriver::Press(float x, float y, int index) {
+void SyntheticTouchDriver::Press(float x, float y, int index, int button) {
   DCHECK_GE(index, 0);
   DCHECK_LT(index, blink::WebTouchEvent::kTouchesLengthCap);
   int touch_index = touch_event_.PressPoint(x, y);
   index_map_[index] = touch_index;
 }
 
 void SyntheticTouchDriver::Move(float x, float y, int index) {
   DCHECK_GE(index, 0);
   DCHECK_LT(index, blink::WebTouchEvent::kTouchesLengthCap);
   touch_event_.MovePoint(index_map_[index], x, y);
 }
 
-void SyntheticTouchDriver::Release(int index) {
+void SyntheticTouchDriver::Release(int index, int button) {
   DCHECK_GE(index, 0);
   DCHECK_LT(index, blink::WebTouchEvent::kTouchesLengthCap);
   touch_event_.ReleasePoint(index_map_[index]);
   index_map_[index] = -1;
 }
 
 bool SyntheticTouchDriver::UserInputCheck(
     const SyntheticPointerActionParams& params) const {
   if (params.index() < 0 ||
       params.index() >= blink::WebTouchEvent::kTouchesLengthCap)
@@ skipping 19 matching lines @@
   if (params.pointer_action_type() ==
           SyntheticPointerActionParams::PointerActionType::RELEASE &&
       index_map_[params.index()] == -1) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace content