Switch mac DumpSymbols::WriteSymbolFile to take an ostream instead of a FILE* to match the changes to Module::Write

R=mark at http://breakpad.appspot.com/294001/show

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@818 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/mac/dump_syms.h

@@ -40,6 +40,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include <ostream>
 #include <string>
 #include <vector>
 
@@ -111,7 +112,7 @@ class DumpSymbols {
   // Read the selected object file's debugging information, and write it
   // out to |stream|. Return true on success; if an error occurs, report it
   // and return false.
-  bool WriteSymbolFile(FILE *stream);
+  bool WriteSymbolFile(std::ostream &stream);
 
  private:
   // Used internally.