scons: excise more scons references from the code base

I got to undo some hacks, too!

TEST=compiles

Review URL: http://codereview.chromium.org/5535003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68119 0039d316-1c4b-4281-b951-d872f2087c98
17 files changed