Fix remaining shared_library link_settings propagation

Fix remaining shared_library link_settings propagation

These changes are necessary to make Chromium build without taking
advantage of a GYP bug that allowed propagation of link_settings out of
a shared_library target.  The GYP bug has been fixed in r1717.

BUG=

[Shezan Baig (Bloomberg), 2013-10-11 15:22:45]

Mark, this is the list of changes to chromium in order to build with the GYP fix
where link_settings are no longer propagated outside shared_library targets.

I finally got all platforms to build.  The remaining failures on the try bots
don't seem related to this patch at all.

Thanks!

[Shezan Baig (Bloomberg), 2013-10-11 16:16:58]

Please let me know if I should split this into smaller patches  for each
sub-directory within src/

Thanks!

[Shezan Baig (Bloomberg), 2013-11-14 00:16:13]

This is a pretty huge patch :(
I'll close this issue and publish separate patches for each subdir.
Stay tuned! :)