Have runtest.py always run linux, mac and windows commands through runisolatedtest.py
Have runtest.py always run linux, mac and windows commands through runisolatedtest.py

BUG=

Review URL: https://chromiumcodereview.appspot.com/14268007

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@194933 0039d316-1c4b-4281-b951-d872f2087c98

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