exo: Implement v6 of touch protocol including shape and frame event

components/exo/touch_delegate.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 COMPONENTS_EXO_TOUCH_DELEGATE_H_
 #define COMPONENTS_EXO_TOUCH_DELEGATE_H_
 
 #include "base/time/time.h"
 
 namespace gfx {
@@ skipping 26 matching lines @@
 
   // Called when a touch point has disappeared. No further events will be sent
   // for this touch point.
   virtual void OnTouchUp(base::TimeTicks time_stamp, int id) = 0;
 
   // Called when a touch point has changed coordinates.
   virtual void OnTouchMotion(base::TimeTicks time_stamp,
                              int id,
                              const gfx::Point& location) = 0;
 
+  // Called when a touch point has changed it's shape.

[reveman, 2016/12/07 03:16:18]

s/it's/its/

[denniskempin, 2016/12/07 23:40:54]

I keep using the ESL excuse, but after 4 years in the US that doesn't cut it
anymore ;)

+  virtual void OnTouchShape(int id, float major, float minor) = 0;
+
+  // Called when the client should apply all updated touches.
+  virtual void OnTouchFrame() = 0;
+
   // Called when the touch session has been canceled. Touch cancellation
   // applies to all touch points currently active.
   virtual void OnTouchCancel() = 0;
 
  protected:
   virtual ~TouchDelegate() {}
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_TOUCH_DELEGATE_H_