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

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h

 // Copyright 2013 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_CHROMEOS_EXTENSIONS_FILE_SYSTEM_PROVIDER_FILE_SYSTEM_PROVIDER_API_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_SYSTEM_PROVIDER_FILE_SYSTEM_PROVIDER_API_H_
 
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
 
 namespace extensions {
 
 class FileSystemProviderMountFunction : public ChromeAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileSystemProvider.mount",
                              FILESYSTEMPROVIDER_MOUNT)
 
  protected:
   virtual ~FileSystemProviderMountFunction() {}
   virtual bool RunImpl() OVERRIDE;
 };
 
+class FileSystemProviderUnmountFunction : public ChromeAsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("fileSystemProvider.unmount",
+                             FILESYSTEMPROVIDER_UNMOUNT)
+
+ protected:
+  virtual ~FileSystemProviderUnmountFunction() {}
+  virtual bool RunImpl() OVERRIDE;
+};
+
+class FileSystemProviderInternalUnmountRequestedSuccessFunction
+    : public ChromeAsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION(
+      "fileSystemProviderInternal.unmountRequestedSuccess",
+      FILESYSTEMPROVIDERINTERNAL_UNMOUNTREQUESTEDSUCCESS)
+
+ protected:
+  virtual ~FileSystemProviderInternalUnmountRequestedSuccessFunction() {}
+  virtual bool RunImpl() OVERRIDE;
+};
+
+class FileSystemProviderInternalUnmountRequestedErrorFunction
+    : public ChromeAsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("fileSystemProviderInternal.unmountRequestedError",
+                             FILESYSTEMPROVIDERINTERNAL_UNMOUNTREQUESTEDERROR)
+
+ protected:
+  virtual ~FileSystemProviderInternalUnmountRequestedErrorFunction() {}
+  virtual bool RunImpl() OVERRIDE;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_SYSTEM_PROVIDER_FILE_SYSTEM_PROVIDER_API_H_