Move plugin/srpc contents to the more appropriately named plugin/common....

src/trusted/plugin/srpc/string_encoding.h

-/*
- * Copyright 2010 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can
- * be found in the LICENSE file.
- */
-
-#ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SRPC_STRING_ENCODING_H_
-#define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SRPC_STRING_ENCODING_H_
-
-#include <stdlib.h>
-
-namespace plugin {
-
-bool ByteStringAsUTF8(const char* input, size_t input_byte_count,
-                      char** result, size_t* result_byte_count);
-bool ByteStringFromUTF8(const char* input, size_t input_byte_count,
-                        char** result, size_t* result_byte_count);
-
-}
-
-#endif