Make SyntheticPointerAction to flush the pointer action sequence

content/browser/renderer_host/input/synthetic_touch_driver.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_TOUCH_DRIVER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_TOUCH_DRIVER_H_
 
 #include <array>
 #include "base/macros.h"
 #include "content/browser/renderer_host/input/synthetic_pointer_driver.h"
 #include "content/common/content_export.h"
 #include "content/common/input/synthetic_web_input_event_builders.h"
 
 namespace content {
 
 class CONTENT_EXPORT SyntheticTouchDriver : public SyntheticPointerDriver {
  public:
   SyntheticTouchDriver();
   explicit SyntheticTouchDriver(SyntheticWebTouchEvent touch_event);
   ~SyntheticTouchDriver() override;
 
   void DispatchEvent(SyntheticGestureTarget* target,
                      const base::TimeTicks& timestamp) override;
 
-  int Press(float x, float y) override;
+  void Press(float x, float y, int index) override;
   void Move(float x, float y, int index) override;
   void Release(int index) override;
 
   bool UserInputCheck(
       const SyntheticPointerActionParams& params) const override;
 
  private:
+  using IndexMap = std::array<int, blink::WebTouchEvent::kTouchesLengthCap>;
+
   SyntheticWebTouchEvent touch_event_;
+  IndexMap index_map_;
+
   DISALLOW_COPY_AND_ASSIGN(SyntheticTouchDriver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_SYNTHETIC_TOUCH_DRIVER_H_