Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_pointer_action.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_POINTER_ACTION_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_POINTER_ACTION_H_
 
 #include "base/macros.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/browser/renderer_host/input/synthetic_pointer.h"
 #include "content/common/content_export.h"
 #include "content/common/input/synthetic_pointer_action_params.h"
 
 namespace content {
 
 class CONTENT_EXPORT SyntheticPointerAction : public SyntheticGesture {
  public:
   explicit SyntheticPointerAction(const SyntheticPointerActionParams& params);
-  SyntheticPointerAction(const SyntheticPointerActionParams& params,
-                         SyntheticPointer* synthetic_pointer);
+  SyntheticPointerAction(
+      const std::vector<SyntheticPointerActionParams>& param_list,
+      SyntheticPointer* synthetic_pointer,
+      std::vector<int>* index_map);
   ~SyntheticPointerAction() override;
 
   SyntheticGesture::Result ForwardInputEvents(
       const base::TimeTicks& timestamp,
       SyntheticGestureTarget* target) override;
 
-  void ForwardTouchOrMouseInputEvents(const base::TimeTicks& timestamp,
-                                      SyntheticGestureTarget* target);
+  SyntheticGesture::Result ForwardTouchOrMouseInputEvents(
+      const base::TimeTicks& timestamp,
+      SyntheticGestureTarget* target);
+
+  void SetSyntheticPointer(SyntheticPointer* synthetic_pointer) {
+    synthetic_pointer_ = synthetic_pointer;
+  }
 
  private:
+  std::vector<SyntheticPointerActionParams> param_list_;
+  SyntheticPointer* synthetic_pointer_;

[tdresser, 2016/05/13 13:58:04]

Add a comment about the lifetimes of these objects, and who owns them.

[lanwei, 2016/05/19 16:04:13]

Done.

+  std::vector<int>* index_map_;
   SyntheticPointerActionParams params_;
-  SyntheticPointer* synthetic_pointer_;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticPointerAction);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_POINTER_ACTION_H_