Set the correct pressure for pointer events based on force

ui/events/event.h

 // Copyright (c) 2012 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_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 313 matching lines @@
   // rotations, animations and skews.
   gfx::PointF root_location_;
 };
 
 // Structure for handling common fields between touch and mouse to support
 // PointerEvents API.
 class EVENTS_EXPORT PointerDetails {
  public:
   PointerDetails() {}
   explicit PointerDetails(EventPointerType pointer_type)
-      : pointer_type_(pointer_type) {}
+      : pointer_type_(pointer_type),
+        force_(std::numeric_limits<float>::quiet_NaN()) {}
   PointerDetails(EventPointerType pointer_type,
                  float radius_x,
                  float radius_y,
                  float force,
                  float tilt_x,
                  float tilt_y)
       : pointer_type_(pointer_type),
         radius_x_(radius_x),
         radius_y_(radius_y),
         force_(force),
@@ skipping 570 matching lines @@
 
   const GestureEventDetails& details() const { return details_; }
 
  private:
   GestureEventDetails details_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_