[UseZoomForDSF] Alwatys use DIP coordinates in pepper plugin

ui/events/blink/blink_event_util.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 UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 #define UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 
+#include "base/memory/scoped_ptr.h"
+
 namespace base {
 class TimeDelta;
 }
 
 namespace blink {
 class WebGestureEvent;
+class WebInputEvent;
 class WebTouchEvent;
 }
 
 namespace gfx {
 class PointF;
 }
 
 namespace ui {
 struct GestureEventData;
 struct GestureEventDetails;
 class MotionEvent;
 
 blink::WebTouchEvent CreateWebTouchEventFromMotionEvent(
     const MotionEvent& event,
     bool may_cause_scrolling);
 
 blink::WebGestureEvent CreateWebGestureEvent(const GestureEventDetails& details,
                                              base::TimeDelta timestamp,
                                              const gfx::PointF& location,
                                              const gfx::PointF& raw_location,
                                              int flags);
 
 // Convenience wrapper for |CreateWebGestureEvent| using the supplied |data|.
 blink::WebGestureEvent CreateWebGestureEventFromGestureEventData(
     const GestureEventData& data);
 
 int EventFlagsToWebEventModifiers(int flags);
 
-}  // namespace content
+scoped_ptr<blink::WebInputEvent> ScaleWebInputEvent(
+    const blink::WebInputEvent& event,
+    float scale);
+
+}  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_