Redefine is_linux to not include Android in the GN build.

This matches the GYP definition and seems to be what most build files expect.

This also removes some additions of lib "dl" which I'm making global.

R=scottmg@chromium.org
TBR=scottmg

Review URL: https://codereview.chromium.org/156563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250572 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250572
Pass DomContentLoaded event from prerenders to launching elements.

Review URL: https://codereview.chromium.org/133073021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250573 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250573