[Files.app] Use util.visitURL to open the webstore link

chrome.windows.create has been obsolete and should not be used.

BUG=343317
TEST=manually tested

Review URL: https://codereview.chromium.org/171563003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251990 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251990
Center the experimental app list [ChromeOS]

This CL centers the app list for ChromeOS when the --enable-experimental-app-list flag
is on as a followup to https://codereview.chromium.org/162753002 .

BUG=344442

Review URL: https://codereview.chromium.org/168733003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251991 0039d316-1c4b-4281-b951-d872f2087c98
linux_aura: Default use_gnome_keyring% to on when use_aura=1.

BUG=342106

Review URL: https://codereview.chromium.org/171583002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251992 0039d316-1c4b-4281-b951-d872f2087c98
Implement viewporting for the out of process PDF plugin.

BUG=303491

Review URL: https://codereview.chromium.org/137663008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251993 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251993