FileAPI: Factor out getting root URI and FS name parts into each FS backend

webkit/browser/fileapi/sandbox_file_system_backend_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 "webkit/browser/fileapi/sandbox_file_system_backend.h"
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
@@ skipping 54 matching lines @@
     "000" PS "p", NULL },
 };
 
 FileSystemURL CreateFileSystemURL(const char* path) {
   const GURL kOrigin("http://foo/");
   return FileSystemURL::CreateForTest(
       kOrigin, kFileSystemTypeTemporary, base::FilePath::FromUTF8Unsafe(path));
 }
 
 void DidOpenFileSystem(base::PlatformFileError* error_out,
+                       const GURL& origin_url,
+                       const std::string& name,
                        base::PlatformFileError error) {
   *error_out = error;
 }
 
 }  // namespace
 
 class SandboxFileSystemBackendTest : public testing::Test {
  protected:
   virtual void SetUp() {
     ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
@@ skipping 263 matching lines @@
                             OPEN_FILE_SYSTEM_CREATE_IF_NONEXISTENT,
                             &root_path));
     base::FilePath expected = file_system_path().AppendASCII(
         kRootPathFileURITestCases[i].expected_path);
     EXPECT_EQ(expected.value(), root_path.value());
     EXPECT_TRUE(file_util::DirectoryExists(root_path));
   }
 }
 
 }  // namespace fileapi