Delete some unused code found by -Wunused-function

webkit/fileapi/local_file_system_operation_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/fileapi/local_file_system_operation.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 22 matching lines @@
 
 namespace {
 
 const int kFileOperationStatusNotSet = 1;
 
 void AssertFileErrorEq(base::PlatformFileError expected,
                        base::PlatformFileError actual) {
   ASSERT_EQ(expected, actual);
 }
 
-FilePath ASCIIToFilePath(const std::string& str) {
-  return FilePath().AppendASCII(str);
-}
-
 }  // namespace (anonymous)
 
 // Test class for LocalFileSystemOperation.
 class LocalFileSystemOperationTest
     : public testing::Test,
       public base::SupportsWeakPtr<LocalFileSystemOperationTest> {
  public:
   LocalFileSystemOperationTest()
       : status_(kFileOperationStatusNotSet),
         next_unique_path_suffix_(0) {
@@ skipping 1147 matching lines @@
   EXPECT_FALSE(info().is_directory);
   EXPECT_EQ(PlatformPath(file_path), path());
   EXPECT_TRUE(change_observer()->HasNoChange());
 
   // The FileSystemOpration implementation does not create a
   // shareable file reference.
   EXPECT_EQ(NULL, shareable_file_ref());
 }
 
 }  // namespace fileapi