Change notification cmd line enabling to use the new RuntimeEnabledFeatures code.

BUG=25318
TEST=none

Review URL: http://codereview.chromium.org/339093

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30660 0039d316-1c4b-4281-b951-d872f2087c98
void BrowserRenderProcessHost::WidgetHidden() {
  if (backgrounded_)
    return;

  DCHECK_EQ(backgrounded_, (visible_widgets_ == 0));
  visible_widgets_--;
  DCHECK_GE(visible_widgets_, 0);
  if (visible_widgets_ == 0) {
    DCHECK(!backgrounded_);
    SetBackgrounded(true);
  }
}

void BrowserRenderProcessHost::WidgetHidden() {
  if (backgrounded_)
    return;

  DCHECK_EQ(backgrounded_, (visible_widgets_ == 0));
  visible_widgets_--;
  DCHECK_GE(visible_widgets_, 0);
  if (visible_widgets_ == 0) {
    DCHECK(!backgrounded_);
    SetBackgrounded(true);
  }
}
