Implements computation of touch calibration transform using user provided data

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 640fcbb8c8f499de202b8db3080bafbbe691e33c..6fdf5fbb53a78b691775fbb7e44610ffe4780321 100644
--- a/ash/touch/touch_transformer_controller.h
+++ b/ash/touch/touch_transformer_controller.h
@@ -35,14 +35,12 @@ class ASH_EXPORT TouchTransformerController
   void OnDisplaysInitialized() override;
   void OnDisplayConfigurationChanged() override;
 
+  // During touch calibration we remove any kind of transform that is being

[kylechar, 2016/12/22 16:56:00]

You removed this from the cc file but not h file.

[malaykeshav, 2016/12/22 19:48:50]

Done.

+  // applied to the touch input's location.
+  void SetForCalibration(bool is_calibrating);
+
  private:
-  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
-                           MirrorModeLetterboxing);
-  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
-                           MirrorModePillarboxing);
-  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, SoftwareMirrorMode);
-  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, ExtendedMode);
-  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, TouchRadiusScale);
+  friend class TouchTransformerControllerTest;
 
   // Returns a transform that will be used to change an event's location from
   // the touchscreen's coordinate system into |display|'s coordinate system.
@@ -82,6 +80,8 @@ class ASH_EXPORT TouchTransformerController
       const display::ManagedDisplayInfo& touch_display,
       const display::ManagedDisplayInfo& target_display) const;
 
+  bool is_calibrating_ = false;

[kylechar, 2016/12/22 16:56:00]

Likewise, you seem to have removed the usage of this variable but not the
variable.

[malaykeshav, 2016/12/22 19:48:50]

Done

+
   DISALLOW_COPY_AND_ASSIGN(TouchTransformerController);
 };