Handle floating point coordinates from ozone to exosphere

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 <memory>
@@ skipping 350 matching lines @@
   }
 
   // Transform the locations using |inverted_root_transform|.
   // This is applied to both |location_| and |root_location_|.
   virtual void UpdateForRootTransform(
       const gfx::Transform& inverted_root_transform);
 
   template <class T> void ConvertLocationToTarget(T* source, T* target) {
     if (!target || target == source)
       return;
-    gfx::Point offset = gfx::ToFlooredPoint(location_);
-    T::ConvertPointToTarget(source, target, &offset);
-    gfx::Vector2d diff = gfx::ToFlooredPoint(location_) - offset;
-    location_= location_ - diff;
+    T::ConvertPointToTargetF(source, target, &location_);
   }
 
  protected:
   friend class LocatedEventTestApi;
 
   explicit LocatedEvent(const base::NativeEvent& native_event);
 
   // Create a new LocatedEvent which is identical to the provided model.
   // If source / target windows are provided, the model location will be
   // converted from |source| coordinate system to |target| coordinate system.
@@ skipping 653 matching lines @@
   // dispatched. This field gets a non-zero value only for gestures that are
   // released through TouchDispositionGestureFilter::SendGesture. The gesture
   // events that aren't fired directly in response to processing a touch-event
   // (e.g. timer fired ones), this id is zero. See crbug.com/618738.
   uint32_t unique_touch_event_id_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_