Move the number conversions from string_util to a new file....

chrome/browser/parsers/metadata_parser_filebase_unittest.cc

Index: chrome/browser/parsers/metadata_parser_filebase_unittest.cc
===================================================================
--- chrome/browser/parsers/metadata_parser_filebase_unittest.cc	(revision 54340)
+++ chrome/browser/parsers/metadata_parser_filebase_unittest.cc	(working copy)
@@ -8,7 +8,8 @@
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/scoped_temp_dir.h"
-#include "base/string_util.h"
+#include "base/string_number_conversions.h"
+#include "base/string_util.h"  // TODO(brettw) remove when WideToASCII moves.
 #include "chrome/browser/parsers/metadata_parser_filebase.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -41,7 +42,7 @@
     int64 size;
     EXPECT_TRUE(file_util::GetFileSize(test_file_, &size));
 
-    return Int64ToString(size);
+    return base::Int64ToString(size);
   }
 
   ScopedTempDir temp_dir_;