Chrome requires WebTouchPoint to store WebFloatPoint, instead of WebPoint.

content/common/input/synthetic_web_input_event_builders.h

 // 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.
 
 #ifndef CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_
 #define CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_
 
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
@@ skipping 48 matching lines @@
 
 class CONTENT_EXPORT SyntheticWebTouchEvent
     : public NON_EXPORTED_BASE(blink::WebTouchEvent) {
  public:
   SyntheticWebTouchEvent();
 
   // Mark all the points as stationary, and remove any released points.
   void ResetPoints();
 
   // Adds an additional point to the touch list, returning the point's index.
-  int PressPoint(int x, int y);
-  void MovePoint(int index, int x, int y);
+  int PressPoint(float x, float y);
+  void MovePoint(int index, float x, float y);
   void ReleasePoint(int index);
   void CancelPoint(int index);
 
   void SetTimestamp(base::TimeDelta timestamp);
 };
 
 class CONTENT_EXPORT SyntheticWebTouchEventBuilder {
  public:
   static SyntheticWebTouchEvent Build(blink::WebInputEvent::Type type);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_SYNTHETIC_WEB_INPUT_EVENT_BUILDERS_H_