[fsp] Cleanup handling errors for operation requests.

chrome/common/extensions/api/file_system_provider_internal.idl

 // 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.
 
 // Internal, used by fileSystemProvider's custom bindings. These functions are
 // called when events' callbacks are invoked.
 [platforms=("chromeos"),
  implemented_in="chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h", nodoc]
 namespace fileSystemProviderInternal {
   interface Functions {
     // Internal. Success callback of the <code>onUnmountRequested</code>
     // event. Must be called when unmounting is completed.
     static void unmountRequestedSuccess(DOMString fileSystemId,
                                         long requestId);
 
-    // Internal. Error callback of the <code>onUnmountRequested</code>
-    // event. Must be called if unmounting fails.
-    static void unmountRequestedError(
-        DOMString fileSystemId,
-        long requestId,
-        fileSystemProvider.ProviderError error);
-
     // Internal. Success callback of the <code>onGetMetadataRequested</code>
     // event. Must be called if metadata is available.
     static void getMetadataRequestedSuccess(
         DOMString fileSystemId,
         long requestId,
         fileSystemProvider.EntryMetadata metadata);
 
-    // Internal. Error callback of the <code>onGetMetadataRequested</code>
-    // event. Must be called when obtaining metadata fails.
-    static void getMetadataRequestedError(
-        DOMString fileSystemId,
-        long requestId,
-        fileSystemProvider.ProviderError error);
-
     // Internal. Success callback of the <code>onReadDirectoryRequested</code>
     // event. Can be called multiple times per request.
     static void readDirectoryRequestedSuccess(
         DOMString fileSystemId,
         long requestId,
         fileSystemProvider.EntryMetadata[] entries,
         boolean hasMore);
 
-    // Internal. Error callback of the <code>onReadDirectoryRequested</code>
-    // event. Must be called when reading a directory fails.
-    static void readDirectoryRequestedError(
-        DOMString fileSystemId,
-        long requestId,
-        fileSystemProvider.ProviderError error);
-
     // Internal. Success callback of the <code>onOpenFileRequested</code> event.
     // Must be called, when opening succeeds.
     static void openFileRequestedSuccess(
         DOMString fileSystemId,
         long requestId);
 
-    // Internal. Error callback of the <code>onOpenFileRequested</code> event.
-    // Must be called when opening fails.
-    static void openFileRequestedError(
-        DOMString fileSystemId,
-        long requestId,
-        fileSystemProvider.ProviderError error);
-
     // Internal. Success callback of the <code>onCloseFileRequested</code>
     // event. Must be called, when closing succeeds.
     static void closeFileRequestedSuccess(
         DOMString fileSystemId,
         long requestId);
 
-    // Internal. Error callback of the <code>onCloseFileRequested</code> event.
-    // Must be called when closing fails.
-    static void closeFileRequestedError(
-        DOMString fileSystemId,
-        long requestId,
-        fileSystemProvider.ProviderError error);
-
     // Internal. Success callback of the <code>onReadFileRequested</code>
     // event. Can be called multiple times per request.
     static void readFileRequestedSuccess(
         DOMString fileSystemId,
         long requestId,
         ArrayBuffer data,
         boolean hasMore);
 
-    // Internal. Error callback of the <code>onReadFileRequested</code>
-    // event. Must be called when reading a file fails.
-    static void readFileRequestedError(
+    // Internal. Error callback of all of the operation requests. Must be called
+    // if an operation fails.
+    static void operationRequestedError(
         DOMString fileSystemId,
         long requestId,
         fileSystemProvider.ProviderError error);
+
   };
 };