Sync android-chrome revision along with chromium on android-chrome platform.

tools/auto_bisect/source_control.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.
 
 """This module contains functions for performing source control operations."""
 
 import bisect_utils
 
 
 def IsInGitRepository():
@@ skipping 16 matching lines @@
   cmd = ['log', '--format=%H', '-10000', '--first-parent', revision_range]
   log_output = bisect_utils.CheckRunGit(cmd, cwd=cwd)
 
   revision_hash_list = log_output.split()
   revision_hash_list.append(start_revision_hash)
 
   return revision_hash_list
 
 
 def SyncToRevision(revision, sync_client=None):
+  """Syncs or checks out a revision based on sync_client argument.
+
+  Args:
+    revision: Git hash for the solutions with the format <repo>@rev.
+        E.g., "src@2ae43f...", "src/third_party/webkit@asr1234" etc.
+    sync_client: Syncs to revision when this is True otherwise checks out
+        the revision.
+
+  Returns:
+    True if sync or checkout is successful, False otherwise.
+  """
   if not sync_client:
     _, return_code = bisect_utils.RunGit(['checkout', revision])
   elif sync_client == 'gclient':
-    return_code = bisect_utils.RunGClientAndSync(revision)
+    return_code = bisect_utils.RunGClientAndSync([revision])
   else:
     raise NotImplementedError('Unsupported sync_client: "%s"' % sync_client)
 
   return not return_code
 
 
+def GetCurrentRevision(cwd=None):
+  """Gets current revision of the given repository."""
+  return bisect_utils.CheckRunGit(['rev-parse', 'HEAD'], cwd=cwd).strip()
+
+
 def ResolveToRevision(revision_to_check, depot, depot_deps_dict,
                       search, cwd=None):
   """Tries to resolve an SVN revision or commit position to a git SHA1.
 
   Args:
     revision_to_check: The user supplied revision string that may need to be
         resolved to a git commit hash. This may be an SVN revision, git commit
         position, or a git commit hash.
     depot: The depot (dependency repository) that |revision_to_check| is from.
     depot_deps_dict: A dictionary with information about different depots.
@@ skipping 151 matching lines @@
       'log',
       '--format=%H',
       '%s~1..%s' % (revision_start, revision_end),
       '--',
       filename,
   ]
   output = bisect_utils.CheckRunGit(cmd)
   lines = output.split('\n')
   return [o for o in lines if o]