AutoFill: Release the cached frame when we receive the frameDestroyed() message
from WebKit.

BUG=48857
TEST=none

Review URL: http://codereview.chromium.org/3173005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55789 0039d316-1c4b-4281-b951-d872f2087c98
void RenderView::OnSetContentSettingsForLoadingURL(
    const GURL& url,
    const ContentSettings& content_settings) {
  host_content_settings_[url] = content_settings;
}

void RenderView::OnSetContentSettingsForLoadingURL(
    const GURL& url,
    const ContentSettings& content_settings) {
  host_content_settings_[url] = content_settings;
}
