ash: Refactor of TouchTransformerController

ash/touch/touch_transformer_controller.h

 // Copyright 2014 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 ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
 #define ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
 #include "ui/gfx/transform.h"
@@ skipping 43 matching lines @@
                                    const ui::TouchscreenDevice& touchscreen,
                                    const gfx::Size& framebuffer_size) const;
 
   // Returns the scaling factor for the touch radius such that it scales the
   // radius from |touch_device|'s coordinate system to the |touch_display|'s
   // coordinate system.
   double GetTouchResolutionScale(
       const DisplayInfo& touch_display,
       const ui::TouchscreenDevice& touch_device) const;
 
+  // For the provided |display| update the touch radius mapping.
+  void UpdateTouchRadius(const DisplayInfo& display) const;
+
+  // For a given |target_display| and |target_display_id| update the touch
+  // transformation based on the touchscreen associated with |touch_display|.
+  // |target_display_id| is the display id whose root window will receive the
+  // touch events.
+  // |touch_display| is the physical display that has the touchscreen
+  // from which the events arrive.
+  // |target_display| provides the dimensions to which the touch event will be
+  // transformed.
+  void UpdateTouchTransform(int64_t target_display_id,
+                            const DisplayInfo& touch_display,
+                            const DisplayInfo& target_display) const;
+
   DISALLOW_COPY_AND_ASSIGN(TouchTransformerController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_