Fix chromium update in auto-roller.

tools/push-to-trunk/chromium_roll.py

Index: tools/push-to-trunk/chromium_roll.py
diff --git a/tools/push-to-trunk/chromium_roll.py b/tools/push-to-trunk/chromium_roll.py
index fe389efb37096343963ab982a9dac67bb8c1bb93..6d9e5bd8d81e91fbec543ff53b4c91e51ece4529 100755
--- a/tools/push-to-trunk/chromium_roll.py
+++ b/tools/push-to-trunk/chromium_roll.py
@@ -73,6 +73,12 @@ class UpdateChromiumCheckout(Step):
     os.chdir(self["chrome_path"])
     self.GitCheckout("master")
     self._side_effect_handler.Command("gclient", "sync --nohooks")
+    try:
+      # TODO(machenbach): Add cwd to git calls.
+      os.chdir(os.path.join(self["chrome_path"], "v8"))
+      self.GitFetchOrigin()

[Ryan Tseng, 2014/08/27 10:19:44]

This is going to run into the same problem as before (need to fetch to cache,
then fetch to repo)

Seeing how gclient's only reason for existence is to fetch subprojects.... I
think theres something else wrong here.

+    finally:
+      os.chdir(self["chrome_path"])
     self.GitCreateBranch("v8-roll-%s" % self["trunk_revision"])