LayerTreeHost should not modify the LayerTreeSettings object.

Instead it should use a temporary variable wherever needed and
leave the settings object const.  This patch removes the last
instance of this behavior and makes the settings object const.

BUG=234233

Review URL: https://codereview.chromium.org/23463042

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227149 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227149
PNaCl documentation: dynamic linking isn't supported by PNaCl

R= dschuff@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3634
NOTRY=true

Review URL: https://codereview.chromium.org/26068003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227150 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227150