Move string16 and char16 in to base::

minidump/minidump_string_writer.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 14 matching lines @@
 #include "minidump/minidump_extensions.h"
 #include "minidump/minidump_rva_list_writer.h"
 #include "minidump/minidump_writable.h"
 
 namespace crashpad {
 namespace internal {
 
 //! \cond
 
 struct MinidumpStringWriterUTF16Traits {
-  using StringType = string16;
+  using StringType = base::string16;
   using MinidumpStringType = MINIDUMP_STRING;
 };
 
 struct MinidumpStringWriterUTF8Traits {
   using StringType = std::string;
   using MinidumpStringType = MinidumpUTF8String;
 };
 
 //! \endcond
 
@@ skipping 126 matching lines @@
 }  // namespace internal
 
 using MinidumpUTF16StringListWriter = internal::MinidumpStringListWriter<
     internal::MinidumpUTF16StringWriter>;
 using MinidumpUTF8StringListWriter = internal::MinidumpStringListWriter<
     internal::MinidumpUTF8StringWriter>;
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_STRING_WRITER_H_