Add public version macros.

tools/release/merge_to_branch.py

 #!/usr/bin/env python
 # Copyright 2014 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 151 matching lines @@
     self.ReadAndPersistVersion()
 
 
 class IncrementVersion(Step):
   MESSAGE = "Increment version number."
 
   def RunStep(self):
     if self._options.revert_master:
       return
     new_patch = str(int(self["patch"]) + 1)
-    if self.Confirm("Automatically increment PATCH_LEVEL? (Saying 'n' will "
+    if self.Confirm("Automatically increment V8_PATCH_LEVEL? (Saying 'n' will "
                     "fire up your EDITOR on %s so you can make arbitrary "
                     "changes. When you're done, save the file and exit your "
                     "EDITOR.)" % VERSION_FILE):
       text = FileToText(os.path.join(self.default_cwd, VERSION_FILE))
-      text = MSub(r"(?<=#define PATCH_LEVEL)(?P<space>\s+)\d*$",
+      text = MSub(r"(?<=#define V8_PATCH_LEVEL)(?P<space>\s+)\d*$",
                   r"\g<space>%s" % new_patch,
                   text)
       TextToFile(text, os.path.join(self.default_cwd, VERSION_FILE))
     else:
       self.Editor(os.path.join(self.default_cwd, VERSION_FILE))
     self.ReadAndPersistVersion("new_")
     self["version"] = "%s.%s.%s.%s" % (self["new_major"],
                                        self["new_minor"],
                                        self["new_build"],
                                        self["new_patch"])
@@ skipping 119 matching lines @@
       CommitLocal,
       UploadStep,
       CommitRepository,
       TagRevision,
       CleanUp,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(MergeToBranch().Run())