Revert 245131 "Add the UI compositor to the Mac build", which caused Mac ASan redness


> Add the UI compositor to the Mac build
> 
> Move the bulk of the files in content/browser/aura to
> content/browser/compositor, since they're not aura-specific.
> 
> Build all of those files in the Mac build, and add ui/compositor
> to the dependencies of the Mac build. These files will soon only
> be excluded from the Android build.
> 
> BUG=314190
> 
> Review URL: https://codereview.chromium.org/137893007

TBR=ccameron@chromium.org
BUG=335083

Review URL: https://codereview.chromium.org/137853019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245195 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245195