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..a821d5d64a7dc4fcad7a488dc345fd92495260b6 100644
--- a/ash/touch/touch_transformer_controller.h
+++ b/ash/touch/touch_transformer_controller.h
@@ -35,6 +35,10 @@ class ASH_EXPORT TouchTransformerController
   void OnDisplaysInitialized() override;
   void OnDisplayConfigurationChanged() override;
 
+  // During touch calibration we remove any kind of transform that is being
+  // applied to the touch input's location.
+  void SetForCalibration(bool is_calibrating);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
                            MirrorModeLetterboxing);
@@ -43,6 +47,19 @@ class ASH_EXPORT TouchTransformerController
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, SoftwareMirrorMode);
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, ExtendedMode);
   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, TouchRadiusScale);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, OzoneTranslation);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           AccurateUserTouchCalibration);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           ErrorProneUserTouchCalibration);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           ResolutionChangeUserTouchCalibration);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           DifferentBoundsUserTouchCalibration);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           LetterboxingUserTouchCalibration);
+  FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
+                           PillarBoxingUserTouchCalibration);
 
   // 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 +99,8 @@ class ASH_EXPORT TouchTransformerController
       const display::ManagedDisplayInfo& touch_display,
       const display::ManagedDisplayInfo& target_display) const;
 
+  bool is_calibrating_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(TouchTransformerController);
 };