[fsp] Add a method to enumerate all mounted file systems.

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/chromeos/extensions/file_system_provider/provider_function.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 
@@ skipping 12 matching lines @@
 class FileSystemProviderUnmountFunction : public ChromeSyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileSystemProvider.unmount",
                              FILESYSTEMPROVIDER_UNMOUNT)
 
  protected:
   virtual ~FileSystemProviderUnmountFunction() {}
   virtual bool RunSync() OVERRIDE;
 };
 
+class FileSystemProviderGetAllFunction : public ChromeSyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("fileSystemProvider.getAll",
+                             FILESYSTEMPROVIDER_GETALL)
+
+ protected:
+  virtual ~FileSystemProviderGetAllFunction() {}
+  virtual bool RunSync() OVERRIDE;
+};
+
 class FileSystemProviderInternalUnmountRequestedSuccessFunction
     : public FileSystemProviderInternalFunction {
  public:
   DECLARE_EXTENSION_FUNCTION(
       "fileSystemProviderInternal.unmountRequestedSuccess",
       FILESYSTEMPROVIDERINTERNAL_GETMETADATAREQUESTEDSUCCESS)
 
  protected:
   virtual ~FileSystemProviderInternalUnmountRequestedSuccessFunction() {}
   virtual bool RunWhenValid() OVERRIDE;
@@ skipping 55 matching lines @@
       FILESYSTEMPROVIDERINTERNAL_OPERATIONREQUESTEDERROR)
 
  protected:
   virtual ~FileSystemProviderInternalOperationRequestedErrorFunction() {}
   virtual bool RunWhenValid() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_SYSTEM_PROVIDER_FILE_SYSTEM_PROVIDER_API_H_