[Findit] Fetch DEPS from buildspec/ instead of trunk for chrome official builds.

appengine/findit/common/test/git_repository_test.py

Index: appengine/findit/common/test/git_repository_test.py
diff --git a/appengine/findit/common/test/git_repository_test.py b/appengine/findit/common/test/git_repository_test.py
index a0991742638da9b6fac6acdb7840e21c327aed83..d870f81d4aceabbd1a7fe3eca63a56aaf0adc567 100644
--- a/appengine/findit/common/test/git_repository_test.py
+++ b/appengine/findit/common/test/git_repository_test.py
@@ -599,3 +599,28 @@ class GitRepositoryTest(testing.AppengineTestCase):
     self.assertRaisesRegexp(
         Exception, 'Failed to pull changelog for revision 2',
         self.git_repo.GetChangeLogs, '0', '2')
+
+  def testGetRevisionForChromeVersion(self):
+
+    def _MockGetChangeLog(*_):
+      changelog = ChangeLog.FromDict(DUMMY_CHANGELOG_JSON)
+      changelog.revision = '123a'
+      return changelog
+
+    self.mock(git_repository.GitRepository, 'GetChangeLog', _MockGetChangeLog)
+
+    git_repo = git_repository.GitRepository(self.repo_url,
+                                            self.http_client_for_git)
+    self.assertEqual(git_repo.GetRevisionForChromeVersion('50.0.1234.0'),
+                     '123a')
+
+  def testGetRevisionForChromeVersionFailToGetChangeLog(self):
+
+    def _MockGetChangeLog(*_):
+      return None
+
+    self.mock(git_repository.GitRepository, 'GetChangeLog', _MockGetChangeLog)
+
+    git_repo = git_repository.GitRepository(self.repo_url,
+                                            self.http_client_for_git)
+    self.assertIsNone(git_repo.GetRevisionForChromeVersion('50.0.1234.0'))