Add new InputDeviceManager interface.

ui/events/devices/device_data_manager.cc

Index: ui/events/devices/device_data_manager.cc
diff --git a/ui/events/devices/device_data_manager.cc b/ui/events/devices/device_data_manager.cc
index 46d2029c725f4f9314f984b3b052b6551d1d0954..e23d92ad5f672d4758ef5cfc2c52abe0a245ff4e 100644
--- a/ui/events/devices/device_data_manager.cc
+++ b/ui/events/devices/device_data_manager.cc
@@ -41,9 +41,13 @@ void DeviceDataManager::TouchscreenInfo::Reset() {
 // static
 DeviceDataManager* DeviceDataManager::instance_ = nullptr;
 
-DeviceDataManager::DeviceDataManager() {}
+DeviceDataManager::DeviceDataManager() {
+  InputDeviceManager::SetInstance(this);
+}
 
-DeviceDataManager::~DeviceDataManager() {}
+DeviceDataManager::~DeviceDataManager() {
+  InputDeviceManager::ClearInstance();
+}
 
 // static
 DeviceDataManager* DeviceDataManager::instance() { return instance_; }
@@ -130,6 +134,27 @@ void DeviceDataManager::ApplyTouchTransformer(int touch_device_id,
   }
 }
 
+const std::vector<TouchscreenDevice>& DeviceDataManager::touchscreen_devices()
+    const {
+  return touchscreen_devices_;
+}
+
+const std::vector<InputDevice>& DeviceDataManager::keyboard_devices() const {
+  return keyboard_devices_;
+}
+
+const std::vector<InputDevice>& DeviceDataManager::mouse_devices() const {
+  return mouse_devices_;
+}
+
+const std::vector<InputDevice>& DeviceDataManager::touchpad_devices() const {
+  return touchpad_devices_;
+}
+
+bool DeviceDataManager::device_lists_complete() const {
+  return device_lists_complete_;
+}
+
 int64_t DeviceDataManager::GetTargetDisplayForTouchDevice(
     int touch_device_id) const {
   if (IsTouchDeviceIdValid(touch_device_id))