Add an option to specify requested fields for fetching metadata.

chrome/browser/media_galleries/fileapi/media_file_validator_browsertest.cc

 // 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.
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/location.h"
@@ skipping 159 matching lines @@
               base::Bind(&MediaFileValidatorTest::OnCheckFilesFirstResult,
                          base::Unretained(this), !src_expected, callback));
   }
 
   // Helper that checks a file has the |expected_size|, which may be
   // |kNoFileSize| if the file should not exist.  |callback| is called
   // with success/failure.
   void CheckFile(storage::FileSystemURL url,
                  int64 expected_size,
                  const base::Callback<void(bool success)>& callback) {
-    operation_runner()->GetMetadata(url,
-                                    base::Bind(&HandleCheckFileResult,
-                                               expected_size, callback));
+    operation_runner()->GetMetadata(
+        url, storage::FileSystemOperation::GET_METADATA_FIELD_SIZE,
+        base::Bind(&HandleCheckFileResult, expected_size, callback));
   }
 
   // Helper that checks the result of |move_src_| lookup and then checks
   // |move_dest_| if all is as expected.
   void OnCheckFilesFirstResult(bool dest_expected,
                                const base::Callback<void(bool)>& callback,
                                bool src_result) {
     EXPECT_TRUE(src_result);
     if (!src_result) {
       callback.Run(false);
@@ skipping 84 matching lines @@
   test_file = test_file.AppendASCII("no_streams.webm");
   MoveTestFromFile("no_streams.webm", test_file, false);
 }
 
 IN_PROC_BROWSER_TEST_F(MediaFileValidatorTest, ValidVideo) {
   base::FilePath test_file = GetMediaTestDir();
   ASSERT_FALSE(test_file.empty());
   test_file = test_file.AppendASCII("bear-320x240-multitrack.webm");
   MoveTestFromFile("multitrack.webm", test_file, true);
 }