Move Bluetooth.Web.FunctionCall.Count UMA from browser to WebKit

third_party/WebKit/Source/modules/bluetooth/BluetoothMetrics.h

+// Copyright 2017 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 BluetoothMetrics_h
+#define BluetoothMetrics_h
+
+namespace blink {
+
+// Enumeration of each Web Bluetooth API entry point.
+enum class UMAWebBluetoothFunction {
+  REQUEST_DEVICE = 0,
+  CONNECT_GATT = 1,
+  GET_PRIMARY_SERVICE = 2,
+  SERVICE_GET_CHARACTERISTIC = 3,
+  CHARACTERISTIC_READ_VALUE = 4,
+  CHARACTERISTIC_WRITE_VALUE = 5,
+  CHARACTERISTIC_START_NOTIFICATIONS = 6,
+  CHARACTERISTIC_STOP_NOTIFICATIONS = 7,
+  REMOTE_GATT_SERVER_DISCONNECT = 8,
+  SERVICE_GET_CHARACTERISTICS = 9,
+  GET_PRIMARY_SERVICES = 10,
+  DESCRIPTOR_READ_VALUE = 11,
+  DESCRIPTOR_WRITE_VALUE = 12,
+  CHARACTERISTIC_GET_DESCRIPTOR = 13,
+  CHARACTERISTIC_GET_DESCRIPTORS = 14,
+  // NOTE: Add new actions immediately above this line. Make sure to update
+  // the enum list in tools/metrics/histograms/histograms.xml accordingly.
+  COUNT
+};
+
+// There should be a call to this function for every call to the Web Bluetooth
+// API.
+void RecordWebBluetoothFunctionCall(UMAWebBluetoothFunction);

[haraken, 2017/03/23 23:36:34]

Nit: We normally create a static class.

class BluetoothMetrics {
  STATIC_ONLY();
  static void recordMetrics();
};

[juncai, 2017/03/27 19:08:57]

Done.

+
+}  // namespace blink
+
+#endif  // BluetoothMetrics_h