Add merge-to-branch python port.

tools/push-to-trunk/common_includes.py

Index: tools/push-to-trunk/common_includes.py
diff --git a/tools/push-to-trunk/common_includes.py b/tools/push-to-trunk/common_includes.py
index 4eb33e92b7a09b28a7cdaa6a5239a5eb4c373063..f1d5e50117ccbed134ce9b30cace756585d838ad 100644
--- a/tools/push-to-trunk/common_includes.py
+++ b/tools/push-to-trunk/common_includes.py
@@ -227,6 +227,7 @@ class CommonOptions(object):
     self.force_readline_defaults = not manual
     self.force_upload = not manual
     self.manual = manual
+    self.reviewer = getattr(options, 'reviewer', None)
     self.author = getattr(options, 'a', None)
 
 
@@ -302,6 +303,10 @@ class Step(object):
     cmd = lambda: self._side_effect_handler.Command("git", args, prefix, pipe)
     return self.Retry(cmd, retry_on, [5, 30])
 
+  def SVN(self, args="", prefix="", pipe=True, retry_on=None):
+    cmd = lambda: self._side_effect_handler.Command("svn", args, prefix, pipe)
+    return self.Retry(cmd, retry_on, [5, 30])
+
   def Editor(self, args):
     if self._options.requires_editor:
       return self._side_effect_handler.Command(os.environ["EDITOR"], args,
@@ -462,9 +467,9 @@ class UploadStep(Step):
   MESSAGE = "Upload for code review."
 
   def RunStep(self):
-    if self._options.r:
-      print "Using account %s for review." % self._options.r
-      reviewer = self._options.r
+    if self._options.reviewer:
+      print "Using account %s for review." % self._options.reviewer
+      reviewer = self._options.reviewer
     else:
       print "Please enter the email address of a V8 reviewer for your patch: ",
       self.DieNoManualMode("A reviewer must be specified in forced mode.")