Remove vestigial code left over from prior cleanup.

There used to be an || condition on the outer if statement so it was possible
to enter the if with viewHasCompostedLayer set to true. The || portion of the
if was removed so, if we're inside the block then we know that
viewHasCompostedLayer is false. Which means, we never execute the inner if
statement.

Review URL: https://codereview.chromium.org/149263003

git-svn-id: svn://svn.chromium.org/blink/trunk@166012 bbb929c8-8fbe-4397-9dbb-9b2b20218538