Don't prepend an 'r' to the revision if we're using git.
Don't prepend an 'r' to the revision if we're using git.

Review URL: http://codereview.chromium.org/8221024

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@104818 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build