Default gclient's GIT_MODE to True

recipe_modules/gclient/test_api.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import hashlib
 
 from recipe_engine import recipe_test_api
 
 class GclientTestApi(recipe_test_api.RecipeTestApi):
   def output_json(self, projects, git_mode=False):
@@ skipping 14 matching lines @@
         for p in projects
       )
     })
 
   @staticmethod
   def gen_revision(project, GIT_MODE):
     """Hash project to bogus deterministic revision values."""
     h = hashlib.sha1(project)
     if GIT_MODE:
       return h.hexdigest()
-    else:
+    else:  # pragma: no cover
       import struct
       return struct.unpack('!I', h.digest()[:4])[0] % 300000