Make gclient revert work with DEPS when DEPS url changes.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 473a1bde81224395e8cb0e2adc619f3533099f2c..4bcc4b7ffc59c855a5985b25c47c75fa5d996193 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -717,7 +717,14 @@ class GitWrapper(SCMWrapper):
       deps_revision = default_rev
     if deps_revision.startswith('refs/heads/'):
       deps_revision = deps_revision.replace('refs/heads/', self.remote + '/')
-    deps_revision = self.GetUsableRev(deps_revision, options)
+    try:
+      deps_revision = self.GetUsableRev(deps_revision, options)
+    except gclient_utils.Error as e:
+      # If the DEPS entry's url and hash changed, try to update the origin.
+      # See also http://crbug.com/520067.
+      if 'safesync_url response "%s"' % deps_revision in e.message:

[nodir, 2015/08/12 17:04:26]

Define a new exception class and raise it in lines 759 and 809
https://code.google.com/p/chromium/codesearch#chromium/tools/depot_tools/gcli...

[tandrii(chromium), 2015/08/12 17:17:33]

Good idea, I was just lazy. Done.

+        return self.update(options, [], file_list)
+      raise
 
     if file_list is not None:
       files = self._Capture(['diff', deps_revision, '--name-only']).split()