Remove WebFrame-based WebApplicationCacheHost API and move to platform includes

BUG=343272

Review URL: https://codereview.chromium.org/171773005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252379 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252379