Add support to Pickle for reading and writing floats

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 72 matching lines @@
 }
 
 bool PickleIterator::ReadInt64(int64* result) {
   return ReadBuiltinType(result);
 }
 
 bool PickleIterator::ReadUInt64(uint64* result) {
   return ReadBuiltinType(result);
 }
 
+bool PickleIterator::ReadFloat(float* result) {
+  return ReadBuiltinType(result);
+}
+
 bool PickleIterator::ReadString(std::string* result) {
   int len;
   if (!ReadInt(&len))
     return false;
   const char* read_from = GetReadPointerAndAdvance(len);
   if (!read_from)
     return false;
 
   result->assign(read_from, len);
   return true;
@@ skipping 245 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;
 }