gclient: Revert r52941's changes to gclient_scm.py.
gclient: Revert r52941's changes to gclient_scm.py.

This looks like it broke syncing from git repos:

  File "/home/derat/local/depot_tools/gclient.py", line 1208, in <module>
    sys.exit(Main(sys.argv[1:]))
  File "/home/derat/local/depot_tools/gclient.py", line 1198, in Main
    return command(parser, argv[1:])
  File "/home/derat/local/depot_tools/gclient.py", line 1035, in CMDsync
    return client.RunOnDeps('update', args)
  File "/home/derat/local/depot_tools/gclient.py", line 621, in RunOnDeps
    scm.RunCommand(command, self._options, args, file_list)
  File "/home/derat/local/depot_tools/gclient_scm.py", line 115, in RunCommand
    return getattr(self, command)(options, args, file_list)
  File "/home/derat/local/depot_tools/gclient_scm.py", line 264, in update
    print_error=False)
  File "/home/derat/local/depot_tools/scm.py", line 84, in Capture
    return gclient_utils.CheckCall(c, in_directory, print_error)
  File "/home/derat/local/depot_tools/gclient_utils.py", line 58, in CheckCall
    raise CheckCallError(command, cwd, process.returncode, std_out, std_err)
gclient_utils.CheckCallError: (['git', 'fetch', 'origin', 'cc1c63d'],
'/usr/local/google/home/derat/chrome/src/third_party/cros', 128, '', "fatal:
Couldn't find remote ref cc1c63d\nfatal: The remote end hung up unexpectedly\n")

BUG=none
TEST=works again after the revert
Review URL: http://codereview.chromium.org/2888023

git-svn-id: fd409f4bdeea2bb50a5d34bb4d4bfc2046a5a3dd@53056 0039d316-1c4b-4281-b951-d872f2087c98

azunite/chrome_build,Chilledheart/depot_tools,withtone/depot_tools,jankeromnes/depot_tools,ajohnson23/depot_tools,mlufei/depot_tools,ajohnson23/depot_tools,Phonebooth/depot_tools,liaorubei/depot_tools,smikes/depot_tools,cybertk/depot_tools,smikes/depot_tools,Neozaru/depot_tools,fanjunwei/depot_tools,airtimemedia/depot_tools,jankeromnes/depot_tools,liaorubei/depot_tools,Phonebooth/depot_tools,fanjunwei/depot_tools,Chilledheart/depot_tools,coreos/depot_tools,airtimemedia/depot_tools,fanjunwei/depot_tools,liaorubei/depot_tools,azureplus/chromium_depot_tools,G-P-S/depot_tools,disigma/depot_tools,azunite/chrome_build,eatbyte/depot_tools,Midrya/chromium,michalliu/chromium-depot_tools,azunite/chrome_build,eatbyte/depot_tools,HackFisher/depot_tools,kromain/chromium-tools,SuYiling/chrome_depot_tools,eatbyte/depot_tools,fracting/depot_tools,jankeromnes/depot_tools,coreos/depot_tools,ajohnson23/depot_tools,fracting/depot_tools,duongbaoduy/gtools,fracting/depot_tools,kaiix/depot_tools,smikes/depot_tools,disigma/depot_tools,Neozaru/depot_tools,HackFisher/depot_tools,chinmaygarde/depot_tools,npe9/depot_tools,xuyuhan/depot_tools,HackFisher/depot_tools,gcodetogit/depot_tools,Midrya/chromium,Neozaru/depot_tools,jankeromnes/depot_tools,SuYiling/chrome_depot_tools,npe9/depot_tools,coreos/depot_tools,azureplus/chromium_depot_tools,coreos/depot_tools,Phonebooth/depot_tools,duanwujie/depot_tools,sarvex/depot-tools,yetu/repotools,withtone/depot_tools,xuyuhan/depot_tools,sarvex/depot-tools,mlufei/depot_tools,xuyuhan/depot_tools,withtone/depot_tools,kaiix/depot_tools,eatbyte/depot_tools,npe9/depot_tools,kromain/chromium-tools,SuYiling/chrome_depot_tools,xuyuhan/depot_tools,michalliu/chromium-depot_tools,michalliu/chromium-depot_tools,aleonliao/depot_tools,airtimemedia/depot_tools,primiano/depot_tools,gcodetogit/depot_tools,yetu/repotools,smikes/depot_tools,Phonebooth/depot_tools,HackFisher/depot_tools,sarvex/depot-tools,cybertk/depot_tools,Neozaru/depot_tools,primiano/depot_tools,fanjunwei/depot_tools,Neozaru/depot_tools,coreos/depot_tools,aleonliao/depot_tools,hsharsha/depot_tools,cybertk/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,CoherentLabs/depot_tools,duongbaoduy/gtools,primiano/depot_tools,chinmaygarde/depot_tools,cybertk/depot_tools,CoherentLabs/depot_tools,sarvex/depot-tools,airtimemedia/depot_tools,Chilledheart/depot_tools,G-P-S/depot_tools,disigma/depot_tools,G-P-S/depot_tools,azureplus/chromium_depot_tools,kromain/chromium-tools,jankeromnes/depot_tools,cybertk/depot_tools,jankeromnes/depot_tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,coreos/depot_tools,chinmaygarde/depot_tools,hsharsha/depot_tools,gcodetogit/depot_tools,Midrya/chromium,duanwujie/depot_tools,mlufei/depot_tools,kaiix/depot_tools,duanwujie/depot_tools,hsharsha/depot_tools,G-P-S/depot_tools,michalliu/chromium-depot_tools,kromain/chromium-tools,cpanelli/-git-clone-https-chromium.googlesource.com-chromium-tools-depot_tools,aleonliao/depot_tools,jankeromnes/depot_tools,duongbaoduy/gtools,smikes/depot_tools,yetu/repotools,Chilledheart/depot_tools,liaorubei/depot_tools,Chilledheart/depot_tools,npe9/depot_tools