Remove Pickle::WriteSize() now that it has no remaining callers.

base/pickle.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/pickle.h"
 
 #include <stdlib.h>
 
 #include <algorithm>  // for max()
 
@@ skipping 56 matching lines @@
 }
 
 bool PickleIterator::ReadInt(int* result) {
   return ReadBuiltinType(result);
 }
 
 bool PickleIterator::ReadLong(long* result) {
   return ReadBuiltinType(result);
 }
 
-bool PickleIterator::ReadSize(size_t* result) {
-  return ReadBuiltinType(result);
-}
-
 bool PickleIterator::ReadUInt16(uint16* result) {
   return ReadBuiltinType(result);
 }
 
 bool PickleIterator::ReadUInt32(uint32* result) {
   return ReadBuiltinType(result);
 }
 
 bool PickleIterator::ReadInt64(int64* result) {
   return ReadBuiltinType(result);
@@ skipping 261 matching lines @@
     return NULL;
 
   const Header* hdr = reinterpret_cast<const Header*>(start);
   const char* payload_base = start + header_size;
   const char* payload_end = payload_base + hdr->payload_size;
   if (payload_end < payload_base)
     return NULL;
 
   return (payload_end > end) ? NULL : payload_end;
 }