Let the browser handle external navigations from DevTools.

BUG=180555


Review URL: https://chromiumcodereview.appspot.com/12531004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@186793 0039d316-1c4b-4281-b951-d872f2087c98
void RenderViewImpl::InstrumentWillBeginFrame() {
  if (!webview())
    return;
  if (!webview()->devToolsAgent())
    return;
  webview()->devToolsAgent()->didBeginFrame();
}

void RenderViewImpl::InstrumentWillBeginFrame() {
  if (!webview())
    return;
  if (!webview()->devToolsAgent())
    return;
  webview()->devToolsAgent()->didBeginFrame();
}
