If JavaScript shows a dialog, cause the page to lose fullscreen.

BUG=670135, 550017, 726761, 728276

Review-Url: https://codereview.chromium.org/2906133004
Cr-Commit-Position: refs/heads/master@{#478884}
void WebContentsImpl::OnDidRunInsecureContent(RenderFrameHostImpl* source,
                                              const GURL& security_origin,
                                              const GURL& target_url) {
  DidRunInsecureContent(security_origin, target_url);
}

void WebContentsImpl::OnDidRunInsecureContent(RenderFrameHostImpl* source,
                                              const GURL& security_origin,
                                              const GURL& target_url) {
  DidRunInsecureContent(security_origin, target_url);
}
