Return 1 from git_cl land when you Ctrl-C it in the middle.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 65524207863dc006b2375af2c1b72d3829abd39d..fcb003c493f229e598db5f1fe2cc76fc7891b9cc 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2037,6 +2037,7 @@ def SendUpstream(parser, args, cmd):
     print 'Failed to push. If this persists, please file a bug.'
     return 1
 
+  killed = False
   if pushed_to_pending:
     try:
       revision = WaitForRealCommit(remote, revision, base_branch, branch)
@@ -2044,7 +2045,7 @@ def SendUpstream(parser, args, cmd):
       # real ref.
       pushed_to_pending = False
     except KeyboardInterrupt:
-      pass
+      killed = True
 
   if cl.GetIssue():
     to_pending = ' to pending queue' if pushed_to_pending else ''
@@ -2081,7 +2082,7 @@ def SendUpstream(parser, args, cmd):
   if os.path.isfile(hook):
     RunCommand([hook, merge_base], error_ok=True)
 
-  return 0
+  return 1 if killed else 0
 
 
 def WaitForRealCommit(remote, pushed_commit, local_base_ref, real_ref):