Make SyntheticPointerAction to flush the pointer action sequence

content/common/input/synthetic_pointer_action_params.h

Index: content/common/input/synthetic_pointer_action_params.h
diff --git a/content/common/input/synthetic_pointer_action_params.h b/content/common/input/synthetic_pointer_action_params.h
index 4e51f036b7352174c7fa2573d0d9b0cd090da414..a11d6ee6bbacfb5cd80ab9461042c80442937663 100644
--- a/content/common/input/synthetic_pointer_action_params.h
+++ b/content/common/input/synthetic_pointer_action_params.h
@@ -18,8 +18,7 @@ struct FuzzTraits;
 
 namespace content {
 
-struct CONTENT_EXPORT SyntheticPointerActionParams
-    : public SyntheticGestureParams {
+struct CONTENT_EXPORT SyntheticPointerActionParams {
  public:
   // Actions are queued up until we receive a PROCESS action, at which point
   // we'll dispatch all queued events. A FINISH action will be received when
@@ -35,14 +34,10 @@ struct CONTENT_EXPORT SyntheticPointerActionParams
   };
 
   SyntheticPointerActionParams();
-  explicit SyntheticPointerActionParams(PointerActionType type);
-  SyntheticPointerActionParams(const SyntheticPointerActionParams& other);
-  ~SyntheticPointerActionParams() override;
-
-  GestureType GetGestureType() const override;
-
-  static const SyntheticPointerActionParams* Cast(
-      const SyntheticGestureParams* gesture_params);
+  SyntheticPointerActionParams(
+      SyntheticGestureParams::GestureSourceType source_type,
+      PointerActionType action_type);
+  ~SyntheticPointerActionParams();
 
   void set_pointer_action_type(PointerActionType pointer_action_type) {
     pointer_action_type_ = pointer_action_type;
@@ -52,7 +47,8 @@ struct CONTENT_EXPORT SyntheticPointerActionParams
     DCHECK(pointer_action_type_ != PointerActionType::PROCESS &&
            pointer_action_type_ != PointerActionType::FINISH);
     // For all mouse pointer actions, the index should always be 0.
-    DCHECK(gesture_source_type != MOUSE_INPUT || index == 0);
+    DCHECK(gesture_source_type_ != SyntheticGestureParams::MOUSE_INPUT ||
+           index == 0);
     index_ = index;
   }
 
@@ -67,7 +63,8 @@ struct CONTENT_EXPORT SyntheticPointerActionParams
   int index() const {
     DCHECK(pointer_action_type_ != PointerActionType::PROCESS &&
            pointer_action_type_ != PointerActionType::FINISH);
-    DCHECK(gesture_source_type != MOUSE_INPUT || index_ == 0);
+    DCHECK(gesture_source_type_ != SyntheticGestureParams::MOUSE_INPUT ||
+           index_ == 0);
     return index_;
   }
 
@@ -81,6 +78,7 @@ struct CONTENT_EXPORT SyntheticPointerActionParams
   friend struct IPC::ParamTraits<content::SyntheticPointerActionParams>;
   friend struct ipc_fuzzer::FuzzTraits<content::SyntheticPointerActionParams>;
 
+  SyntheticGestureParams::GestureSourceType gesture_source_type_;
   PointerActionType pointer_action_type_;
   // Pass a position value when sending a press or move action.
   gfx::PointF position_;