One example is CXX="ccache g++".
Using shell=True seems to be a worse option - we'd have to
construct a string to pass to bash -c, instead of building
a nice argv array.
BUG=none
R=mark@chromium.org
Review URL: https://codereview.chromium.org/14813020
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200910 0039d316-1c4b-4281-b951-d872f2087c98