V8 Buildbot: Experimental change for directly using the svn mirrors for try patches.
V8 Buildbot: Experimental change for directly using the svn mirrors for try patches.

CL https://codereview.chromium.org/211093002/ does not solve the problem of accessing the try svn entirely. The normal svn server still triggers and it is possible that the slave is faster then the mirror resulting in download failures.

TBR=iannucci@chromium.org

Review URL: https://codereview.chromium.org/212533002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@259533 0039d316-1c4b-4281-b951-d872f2087c98

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