ash: Refactor of TouchTransformerController

ash/touch/touch_transformer_controller.h

Index: ash/touch/touch_transformer_controller.h
diff --git a/ash/touch/touch_transformer_controller.h b/ash/touch/touch_transformer_controller.h
index 1ca7acf918b08bb9a91ed426e71cf68d56e1d4d1..bf06f8cc42871c79a81a44a2c796348c80e3b570 100644
--- a/ash/touch/touch_transformer_controller.h
+++ b/ash/touch/touch_transformer_controller.h
@@ -61,6 +61,21 @@ class ASH_EXPORT TouchTransformerController
       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);
 };