device/bluetooth:Implement BluetoothMediaEndpointServiceProvider delegate and media-related overrid…

chromeos/dbus/bluetooth_media_transport_client.h

Index: chromeos/dbus/bluetooth_media_transport_client.h
diff --git a/chromeos/dbus/bluetooth_media_transport_client.h b/chromeos/dbus/bluetooth_media_transport_client.h
index 9ed0af23010ee9ab48d820bd49aee7ef46eb0b7a..0a8b9a20c454c904b0d5fb5a16518072bb1d9074 100644
--- a/chromeos/dbus/bluetooth_media_transport_client.h
+++ b/chromeos/dbus/bluetooth_media_transport_client.h
@@ -73,6 +73,21 @@ class CHROMEOS_EXPORT BluetoothMediaTransportClient : public DBusClient {
         const std::string& property_name) {}
   };
 
+  // TODO(mcchou): Move all static constants to service_constants.h.
+  // Constants used for the names of Media Transport's properties.
+  static const char kDeviceProperty[];
+  static const char kUUIDProperty[];
+  static const char kCodecProperty[];
+  static const char kConfigurationProperty[];
+  static const char kStateProperty[];
+  static const char kDelayProperty[];
+  static const char kVolumeProperty[];
+
+  // All possible states of a valid media transport object.
+  static const char kStateIdle[];
+  static const char kStatePending[];
+  static const char kStateActive[];
+
   ~BluetoothMediaTransportClient() override;
 
   // The ErrorCallback is used by media transport API methods to indicate
@@ -115,10 +130,6 @@ class CHROMEOS_EXPORT BluetoothMediaTransportClient : public DBusClient {
 
   static BluetoothMediaTransportClient* Create();
 
-  // Constants used to indicate exceptional error conditions.
-  static const char kNoResponseError[];
-  static const char kUnexpectedResponse[];
-
  protected:
   BluetoothMediaTransportClient();