Make it possible to refer to github-style URLs.

tests/gclient_utils_test.py

Index: tests/gclient_utils_test.py
diff --git a/tests/gclient_utils_test.py b/tests/gclient_utils_test.py
index e8e667918ab65aa67867b9088dc1add99802bab2..39a3d772d816a0d3eeda577ba6f70a42cbed2866 100755
--- a/tests/gclient_utils_test.py
+++ b/tests/gclient_utils_test.py
@@ -124,6 +124,13 @@ class SplitUrlRevisionTestCase(GclientUtilBase):
     out_url, out_rev = gclient_utils.SplitUrlRevision("%s@%s" % (url, rev))
     self.assertEquals(out_rev, rev)
     self.assertEquals(out_url, url)
+    url = "git@github.com:dart-lang/spark.git"
+    out_url, out_rev = gclient_utils.SplitUrlRevision(url)
+    self.assertEquals(out_rev, None)
+    self.assertEquals(out_url, url)
+    out_url, out_rev = gclient_utils.SplitUrlRevision("%s@%s" % (url, rev))
+    self.assertEquals(out_rev, rev)
+    self.assertEquals(out_url, url)
 
   def testSVNUrl(self):
     url = "svn://example.com/test"