[fsp] Add requestUnmount() method together with the request manager.

extensions/browser/extension_function_histogram_value.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 
 namespace extensions {
 namespace functions {
 
@@ skipping 756 matching lines @@
   BLUETOOTHPRIVATE_SETADAPTERSTATE,
   BLUETOOTHPRIVATE_ENABLEPAIRING,
   BLUETOOTHPRIVATE_DISABLEPAIRING,
   BLUETOOTHPRIVATE_SETPAIRINGRESPONSE,
   NETWORKINGPRIVATE_GETCAPTIVEPORTALSTATUS,
   AUTOMATIONINTERNAL_PERFORMACTION,
   BLUETOOTH_UPDATE_SOCKET,
   BLUETOOTH_SET_SOCKET_PAUSED,
   BLUETOOTH_GET_SOCKET,
   BLUETOOTH_GET_SOCKETS,
+  FILESYSTEMPROVIDER_UNMOUNT,
+  FILESYSTEMPROVIDERINTERNAL_UNMOUNTREQUESTEDSUCCESS,
+  FILESYSTEMPROVIDERINTERNAL_UNMOUNTREQUESTEDERROR,
   // Last entry: Add new entries above and ensure to update
   // tools/metrics/histograms/histograms/histograms.xml.
   ENUM_BOUNDARY
 };
 
 }  // namespace functions
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_