Fix SyntheticPointerActionParams compile error for ipc fuzzer

content/common/input/synthetic_pointer_action_params.h

 // Copyright 2016 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_COMMON_INPUT_SYNTHETIC_POINTER_ACTION_PARAMS_H_
 #define CONTENT_COMMON_INPUT_SYNTHETIC_POINTER_ACTION_PARAMS_H_
 
 #include "base/logging.h"
 #include "content/common/content_export.h"
 #include "content/common/input/input_param_traits.h"
 #include "content/common/input/synthetic_gesture_params.h"
 #include "ui/gfx/geometry/point_f.h"
 
+namespace ipc_fuzzer {
+template <class T>
+struct FuzzTraits;
+}  // namespace ipc_fuzzer
+
 namespace content {
 
 struct CONTENT_EXPORT SyntheticPointerActionParams
     : public SyntheticGestureParams {
  public:
   // Actions are queued up until we receive a PROCESS action, at which point
   // we'll dispatch all queued events.
   enum class PointerActionType {
     NOT_INITIALIZED,
     PRESS,
@@ skipping 36 matching lines @@
   }
 
   gfx::PointF position() const {
     DCHECK(pointer_action_type_ == PointerActionType::PRESS ||
            pointer_action_type_ == PointerActionType::MOVE);
     return position_;
   }
 
  private:
   friend struct IPC::ParamTraits<content::SyntheticPointerActionParams>;
+  friend struct ipc_fuzzer::FuzzTraits<content::SyntheticPointerActionParams>;
 
   PointerActionType pointer_action_type_;
   // Pass a position value when sending a press or move action.
   gfx::PointF position_;
   // Pass an index value except if the pointer_action_type_ is PROCESS.
   int index_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_SYNTHETIC_POINTER_ACTION_PARAMS_H_