adjust {webkit_revision} before we adjust {revision}
adjust {webkit_revision} before we adjust {revision}

In r196054, I attempted to clean up how we were setting the {webkit_revision}
property in the gclient spec for the Blink canaries. However, I missed
seeing the case where a test-only bot is getting the revisions to use
based off of {parent_cr_revision} and {parent_wk_revision}. In that case,
the {revision} argument gets set to "src@{parent_cr_revision}". Because
I adjust the webkit_revision *after* adjusting revision, it can get
set to src@{parent_cr_revision} as well, which is wrong.

This change moves the adjustment of webkit_revision before the check for
parent_cr_revision.

TBR=hinoka@google.com
BUG=229611

Review URL: https://codereview.chromium.org/14771008

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@197636 0039d316-1c4b-4281-b951-d872f2087c98

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