Add unit tests for base::GetSystemMemoryInfo

BUG=176044
TEST=base_unittests ProcessUtilTest

Review URL: https://codereview.chromium.org/12257013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182540 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed