Add OS version information to the bug report utility for the Mac version....

chrome/browser/bug_report_util.cc

Index: chrome/browser/bug_report_util.cc
===================================================================
--- chrome/browser/bug_report_util.cc	(revision 30813)
+++ chrome/browser/bug_report_util.cc	(working copy)
@@ -71,9 +71,13 @@
   } else {
     *os_version = "unknown";
   }
+#elif defined(OS_MACOSX)
+  int32 major;
+  int32 minor;
+  int32 bugFix;
+  base::SysInfo::OperatingSystemVersionNumbers(&major, &minor, &bugFix);
+  *os_version = StringPrintf("%d.%d.%d", major, minor, bugFix);
 #else
-  // Right now, we only get the OS Version for Windows.
-  // TODO(mirandac): make this cross-platform.
   *os_version = "unknown";
 #endif
 }