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

base/stringprintf.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/stringprintf.h"
 
 #include <errno.h>
 
 #include "base/scoped_clear_errno.h"
 #include "base/string_util.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 
 namespace base {
 
 namespace {
 
 // Overloaded wrappers around vsnprintf and vswprintf. The buf_size parameter
 // is the size of the buffer. These return the number of characters in the
 // formatted string excluding the NUL terminator. If the buffer is not
 // large enough to accommodate the formatted string without truncation, they
 // return the number of characters that would be in the fully-formatted string
@@ skipping 155 matching lines @@
   StringAppendVT(dst, format, ap);
 }
 
 #if !defined(OS_ANDROID)
 void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap) {
   StringAppendVT(dst, format, ap);
 }
 #endif
 
 }  // namespace base