[fsp] Pass more detailed errors to the providing extension.

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 22 matching lines @@
 class FileSystemProviderGetAllFunction : public ChromeSyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileSystemProvider.getAll",
                              FILESYSTEMPROVIDER_GETALL)
 
  protected:
   virtual ~FileSystemProviderGetAllFunction() {}
   virtual bool RunSync() override;
 };
 
-class FileSystemProviderNotifyFunction : public ChromeSyncExtensionFunction {
+class FileSystemProviderNotifyFunction : public ChromeAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileSystemProvider.notify",
                              FILESYSTEMPROVIDER_NOTIFY)
 
  protected:
   virtual ~FileSystemProviderNotifyFunction() {}
-  virtual bool RunSync() override;
+  virtual bool RunAsync() override;
+
+ private:
+  // Called when notifying is completed.
+  void OnNotifyCompleted(base::File::Error result);
 };
 
 class FileSystemProviderInternalUnmountRequestedSuccessFunction
     : public FileSystemProviderInternalFunction {
  public:
   DECLARE_EXTENSION_FUNCTION(
       "fileSystemProviderInternal.unmountRequestedSuccess",
       FILESYSTEMPROVIDERINTERNAL_GETMETADATAREQUESTEDSUCCESS)
 
  protected:
@@ skipping 57 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_