Fixes chrome_page_zoom::Zoom(). First, correctly retrieves the default zoom level from the user Profile instead of from RendererPreferences. Second, correctly sets the default zoom level when content::PAGE_ZOOM_RESET is passed as the zoom parameter (previously, it just set the zoom to 100% no matter what the default zoom level was).
BUG=
TBR=jhawkins
Review URL: https://chromiumcodereview.appspot.com/
10826136
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149964 0039d316-1c4b-4281-b951-d872f2087c98