Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_pointer_action.h

Index: content/browser/renderer_host/input/synthetic_pointer_action.h
diff --git a/content/browser/renderer_host/input/synthetic_pointer_action.h b/content/browser/renderer_host/input/synthetic_pointer_action.h
index 23b23fa421be29b1254cd491eebcbaff13adbb06..71b9173671a40037e179c3e1958d3a09c773e512 100644
--- a/content/browser/renderer_host/input/synthetic_pointer_action.h
+++ b/content/browser/renderer_host/input/synthetic_pointer_action.h
@@ -17,8 +17,10 @@ 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,
+      int* index_map);
   ~SyntheticPointerAction() override;
 
   SyntheticGesture::Result ForwardInputEvents(
@@ -28,9 +30,15 @@ class CONTENT_EXPORT SyntheticPointerAction : public SyntheticGesture {
   void ForwardTouchOrMouseInputEvents(const base::TimeTicks& timestamp,
                                       SyntheticGestureTarget* target);
 
+  void SetSyntheticPointer(SyntheticPointer* synthetic_pointer) {
+    synthetic_pointer_ = synthetic_pointer;
+  }
+
  private:
-  SyntheticPointerActionParams params_;
+  std::vector<SyntheticPointerActionParams> param_list_;
   SyntheticPointer* synthetic_pointer_;

[tdresser, 2016/04/18 15:24:39]

What's the lifetime here? Should this be unique_ptr?

[lanwei, 2016/04/19 19:05:32]

synthetic_pointer_ and index_map_ are passed to this function as pointer,
because this function will change the value of these two variables, but
RenderWidgetHostImpl should keep the ownership of these two and manager their
create and destroy, so I use raw pointer.

+  int* index_map_;

[tdresser, 2016/04/18 15:24:39]

Should this be unique_ptr?

+  SyntheticPointerActionParams params_;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticPointerAction);
 };