Removed obsolete float_util.h as VS2013 supports standards well enough.

base/json/json_parser.cc

Index: base/json/json_parser.cc
diff --git a/base/json/json_parser.cc b/base/json/json_parser.cc
index d42b1a3d37e820f0ff3f1b6cfb00dde6e3be9fc8..e9a27bc1675da18970f90c5040a2c3b7820c8fbe 100644
--- a/base/json/json_parser.cc
+++ b/base/json/json_parser.cc
@@ -4,7 +4,8 @@
 
 #include "base/json/json_parser.h"
 
-#include "base/float_util.h"
+#include <cmath>
+
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
@@ -872,7 +873,7 @@ Value* JSONParser::ConsumeNumber() {
 
   double num_double;
   if (base::StringToDouble(num_string.as_string(), &num_double) &&
-      IsFinite(num_double)) {
+      std::isfinite(num_double)) {
     return new FundamentalValue(num_double);
   }