Fix software mirror mode on Ozone part 2/2

ui/events/devices/device_data_manager.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 UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_
 #define UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 15 matching lines @@
 class EVENTS_DEVICES_EXPORT DeviceDataManager
     : public DeviceHotplugEventObserver {
  public:
   static const int kMaxDeviceNum = 128;
   ~DeviceDataManager() override;
 
   static void CreateInstance();
   static DeviceDataManager* GetInstance();
   static bool HasInstance();
 
-  void ClearTouchTransformerRecord();
-  void UpdateTouchInfoForDisplay(int64_t display_id,
+  void ClearTouchDeviceAssociations();
+  void UpdateTouchInfoForDisplay(int64_t target_display_id,
                                  unsigned int touch_device_id,
                                  const gfx::Transform& touch_transformer);
   void ApplyTouchTransformer(unsigned int touch_device_id, float* x, float* y);
-  int64_t GetDisplayForTouchDevice(unsigned int touch_device_id) const;
+
+  // Gets the display that touches from |touch_device_id| should be sent to.
+  int64_t GetTargetDisplayForTouchDevice(unsigned int touch_device_id) const;
 
   void UpdateTouchRadiusScale(unsigned int touch_device_id, double scale);
   void ApplyTouchRadiusScale(unsigned int touch_device_id, double* radius);
 
   const std::vector<TouchscreenDevice>& touchscreen_devices() const {
     return touchscreen_devices_;
   }
 
   const std::vector<KeyboardDevice>& keyboard_devices() const {
     return keyboard_devices_;
@@ skipping 17 matching lines @@
   void OnTouchpadDevicesUpdated(
       const std::vector<InputDevice>& devices) override;
 
  private:
   static DeviceDataManager* instance_;
 
   bool IsTouchDeviceIdValid(unsigned int touch_device_id) const;
 
   double touch_radius_scale_map_[kMaxDeviceNum];
 
-  // Table to keep track of which display id is mapped to which touch device.
-  int64_t touch_device_to_display_map_[kMaxDeviceNum];
+  // Index table to find the target display id for a touch device.
+  int64_t touch_device_to_target_display_map_[kMaxDeviceNum];
   // Index table to find the TouchTransformer for a touch device.
   gfx::Transform touch_device_transformer_map_[kMaxDeviceNum];
 
   std::vector<TouchscreenDevice> touchscreen_devices_;
   std::vector<KeyboardDevice> keyboard_devices_;
   std::vector<InputDevice> mouse_devices_;
   std::vector<InputDevice> touchpad_devices_;
 
   ObserverList<InputDeviceEventObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceDataManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_DEVICES_DEVICE_DATA_MANAGER_H_