Set the default action on the title bar menu properly on Windows.

It is currently not set, thus chosen by the system. However, the default
action is maximized when the window is not maximized and restore when
the window is maximized.

It is fixing the bug mentioned in bug 260229 as a side effect. The
change is actually applying to all windows, not only Chrome Apps ones.

BUG=260229
TEST=Open Chrome on Windows, right click on the title bar. Look at the
item in bold. Double click. The action should match the name of the item
in bold. Repeat another time.

Review URL: https://codereview.chromium.org/113943005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243300 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243300
Added viewport meta tag to about:flags

http://crbug.com/232102 added --enable-viewport-meta to allow desktop
browsers to experimentally honor the viewport <meta> tag. This CL adds
the flag to the about:flags page so it can easily be turned on.

BUG=329996

Review URL: https://codereview.chromium.org/123303002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243301 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243301