[fsp] Remove the exclusive field from the CreateDirectory operation.

chrome/common/extensions/api/file_system_provider.idl

 // 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.
 
 // Use the <code>chrome.fileSystemProvider</code> API to create file systems,
 // that can be accessible from the file manager on Chrome OS.
 [platforms=("chromeos"),
  implemented_in="chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h"]
 namespace fileSystemProvider {
   // Error codes used by providing extensions in response to requests. For
@@ skipping 102 matching lines @@
     long openRequestId;
     double offset;
     double length;
   };
 
   // Options for the <code>onCreateDirectoryRequested()</code> event.
   dictionary CreateDirectoryRequestedOptions {
     DOMString fileSystemId;
     long requestId;
     DOMString directoryPath;
-    boolean exclusive;
     boolean recursive;
   };
 
   // Options for the <code>onDeleteEntryRequested()</code> event.
   dictionary DeleteEntryRequestedOptions {
     DOMString fileSystemId;
     long requestId;
     DOMString entryPath;
     boolean recursive;
   };
@@ skipping 154 matching lines @@
 
     // Raised when reading contents of a file opened previously with <code>
     // openRequestId</code> is requested. The results should be returned in
     // chunks by calling <code>successCallback</code> several times. In case of
     // an error, <code>errorCallback</code> must be called.
     [maxListeners=1] static void onReadFileRequested(
         ReadFileRequestedOptions options,
         FileDataCallback successCallback,
         ProviderErrorCallback errorCallback);
 
-    // Raised when creating a directory is requested. If <code>exclusive</code>
-    // is set to true, then the operation must fail if the target directory
-    // already exists. If <code>recursive</code> is true, then all of the
-    // missing directories on the directory path must be created.
+    // Raised when creating a directory is requested. The operation must fail
+    // with the EXISTS error if the target directory already exists.
+    // If <code>recursive</code> is true, then all of the missing directories
+    // on the directory path must be created.
     [maxListeners=1, nodoc] static void onCreateDirectoryRequested(
         CreateDirectoryRequestedOptions options,
         ProviderSuccessCallback successCallback,
         ProviderErrorCallback errorCallback);
 
     // Raised when deleting an entry is requested. If <code>recursive</code> is
     // true, and the entry is a directory, then all of the entries inside
     // must be recursively deleted as well.
     [maxListeners=1, nodoc] static void onDeleteEntryRequested(
         DeleteEntryRequestedOptions options,
@@ skipping 43 matching lines @@
     // </code> must be called. Note, that callbacks of the aborted operation
     // should not be called, as they will be ignored. Despite calling <code>
     // errorCallback</code>, the request may be forcibly aborted. 
     [maxListeners=1, nodoc] static void onAbortRequested(
         AbortRequestedOptions options,
         ProviderSuccessCallback successCallback,
         ProviderErrorCallback errorCallback);
   };
 };