test IWYU fixups for base

base/value_conversions.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/value_conversions.h"
 
+#include <string>
+
+#include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 
 namespace base {
 
 // |Value| internally stores strings in UTF-8, so we have to convert from the
 // system native code to UTF-8 and back.
 StringValue* CreateFilePathValue(const FilePath& in_value) {
@@ skipping 20 matching lines @@
   std::string str;
   int64 int_value;
   if (!value.GetAsString(&str) || !base::StringToInt64(str, &int_value))
     return false;
   if (time)
     *time = TimeDelta::FromInternalValue(int_value);
   return true;
 }
 
 }  // namespace base