Make long-time goma backend error as compile error.
Make long-time goma backend error as compile error.

Let me enable the flag to make long-time goma backend error as compile error.

Review URL: https://codereview.chromium.org/1140503002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@295220 0039d316-1c4b-4281-b951-d872f2087c98

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