Add FileSystemID parameter to IsolatedContext::RegisterFileSystemForPath.

chrome/browser/chromeos/drive/file_system_util_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/drive/file_system_util.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 181 matching lines @@
   EXPECT_EQ(
       base::FilePath(),
       ExtractDrivePathFromFileSystemUrl(context->CrackURL(GURL(
           "filesystem:chrome-extension://dummy-id/external/Downloads/foo"))));
 
   // Type:"isolated" + virtual_path:"isolated_id/name" mapped on a Drive path.
   std::string isolated_name;
   std::string isolated_id =
       fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForPath(
           fileapi::kFileSystemTypeNativeForPlatformApp,
+          std::string(),
           GetDriveMountPointPath(&profile).AppendASCII("bar/buz"),
           &isolated_name);
   EXPECT_EQ(
       base::FilePath::FromUTF8Unsafe("drive/bar/buz"),
       ExtractDrivePathFromFileSystemUrl(context->CrackURL(GURL(
           "filesystem:chrome-extension://dummy-id/isolated/" +
           isolated_id + "/" + isolated_name))));
 }
 
 TEST(FileSystemUtilTest, EscapeUnescapeCacheFileName) {
@@ skipping 82 matching lines @@
   file = temp_dir.path().AppendASCII("test.txt");
   std::string data = "Hello world!";
   EXPECT_TRUE(google_apis::test_util::WriteStringToFile(file, data));
   EXPECT_FALSE(HasGDocFileExtension(file));
   EXPECT_TRUE(ReadUrlFromGDocFile(file).is_empty());
   EXPECT_TRUE(ReadResourceIdFromGDocFile(file).empty());
 }
 
 }  // namespace util
 }  // namespace drive