Add StringToSizeT to base/string_number_conversions.

base/string_number_conversions.h

 // 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.
 
 #ifndef BASE_STRING_NUMBER_CONVERSIONS_H_
 #define BASE_STRING_NUMBER_CONVERSIONS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
 
 BASE_EXPORT bool StringToUint(const StringPiece& input, unsigned* output);
 BASE_EXPORT bool StringToUint(const StringPiece16& input, unsigned* output);
 
 BASE_EXPORT bool StringToInt64(const StringPiece& input, int64* output);
 BASE_EXPORT bool StringToInt64(const StringPiece16& input, int64* output);
 
 BASE_EXPORT bool StringToUint64(const StringPiece& input, uint64* output);
 BASE_EXPORT bool StringToUint64(const StringPiece16& input, uint64* output);
 
+BASE_EXPORT bool StringToSizeT(const StringPiece& input, size_t* output);
+BASE_EXPORT bool StringToSizeT(const StringPiece16& input, size_t* output);
+
 // For floating-point conversions, only conversions of input strings in decimal
 // form are defined to work.  Behavior with strings representing floating-point
 // numbers in hexadecimal, and strings representing non-fininte values (such as
 // NaN and inf) is undefined.  Otherwise, these behave the same as the integral
 // variants.  This expects the input string to NOT be specific to the locale.
 // If your input is locale specific, use ICU to read the number.
 BASE_EXPORT bool StringToDouble(const std::string& input, double* output);
 
 // Hex encoding ----------------------------------------------------------------
 
@@ skipping 12 matching lines @@
 // |*output| will contain as many bytes as were successfully parsed prior to the
 // error.  There is no overflow, but input.size() must be evenly divisible by 2.
 // Leading 0x or +/- are not allowed.
 BASE_EXPORT bool HexStringToBytes(const std::string& input,
                                   std::vector<uint8>* output);
 
 }  // namespace base
 
 #endif  // BASE_STRING_NUMBER_CONVERSIONS_H_