Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_gesture.cc

 // Copyright 2013 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.
 
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 
 #include "base/logging.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/browser/renderer_host/input/synthetic_pinch_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_pointer_action.h"
@@ skipping 25 matching lines @@
                            SyntheticSmoothScrollGestureParams>(gesture_params);
     case SyntheticGestureParams::SMOOTH_DRAG_GESTURE:
       return CreateGesture<SyntheticSmoothDragGesture,
                            SyntheticSmoothDragGestureParams>(gesture_params);
     case SyntheticGestureParams::PINCH_GESTURE:
       return CreateGesture<SyntheticPinchGesture,
                            SyntheticPinchGestureParams>(gesture_params);
     case SyntheticGestureParams::TAP_GESTURE:
       return CreateGesture<SyntheticTapGesture,
                            SyntheticTapGestureParams>(gesture_params);
-    case SyntheticGestureParams::POINTER_ACTION:
-      return CreateGesture<SyntheticPointerAction,
-                           SyntheticPointerActionParams>(gesture_params);
+    default:
+      NOTREACHED() << "Invalid synthetic gesture type";
+      return nullptr;
   }
-  NOTREACHED() << "Invalid synthetic gesture type";
-  return std::unique_ptr<SyntheticGesture>();
 }
 
 }  // namespace content