Compile issue when using global string "::string".  For more details take a look at src/common/using_std_string.h.
Review URL: https://breakpad.appspot.com/577002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1181 4c0a9323-5329-0410-9bdc-e9ce6186880e