bluetooth: Move GetCharacteristic(s) over to Mojo

third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom

Index: third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom
diff --git a/third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom b/third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom
index bdd829d20c149f7dd8ee6fdac0c444e22373004f..4def9bb32c146205a0f06b2fe3cd1049f3bb564b 100644
--- a/third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom
+++ b/third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom
@@ -68,6 +68,19 @@ enum WebBluetoothError {
   ENUM_MAX_VALUE = REQUEST_DEVICE_WITHOUT_FRAME,
 };
 
+// Indicates if the function will return a single or multiple
+// GATT objects.
+enum WebBluetoothGATTQueryQuantity {
+  SINGLE,
+  MULTIPLE
+};
+
+struct WebBluetoothRemoteGATTCharacteristic {
+  string instance_id;
+  string uuid;
+  uint32 properties;
+};
+
 // TODO(ortuno): Define Bluetooth Service.
 // https://crbug.com/508771
 
@@ -79,6 +92,16 @@ interface WebBluetoothService {
   // a device disconnects.
   SetClient(associated WebBluetoothServiceClient client);
 
+  // Returns the Characteristics of a GATT Service with |service_instance_id|.
+  // If |quantity| == WebBluetoothGATTQueryQuantity::SINGLE, only one
+  // characteristic will be returned.
+  RemoteServiceGetCharacteristics(
+    string service_instance_id,
+    WebBluetoothGATTQueryQuantity quantity,
+    string? characteristics_uuid) => (
+      WebBluetoothError error,
+      array<WebBluetoothRemoteGATTCharacteristic>? characteristics);
+
   // Reads the value for characteristic with
   // |characteristic_instance_id|. If the value is successfully read the
   // callback will be run with WebBluetoothError::SUCCESS and the