Use a direct include of utf_string_conversions.h in android_webview/, apps/, ash/, base/.

base/i18n/file_util_icu_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 "base/i18n/file_util_icu.h"
 
 #include "base/file_util.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 // file_util winds up using autoreleased objects on the Mac, so this needs
 // to be a PlatformTest
 class FileUtilICUTest : public PlatformTest {
 };
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 
@@ skipping 79 matching lines @@
   for (size_t i = 0; i < arraysize(kNormalizeFileNameEncodingTestCases); i++) {
     base::FilePath path(kNormalizeFileNameEncodingTestCases[i].original_path);
     file_util::NormalizeFileNameEncoding(&path);
     EXPECT_EQ(
         base::FilePath(kNormalizeFileNameEncodingTestCases[i].normalized_path),
         path);
   }
 }
 
 #endif