DevTools: 'Overrides' UI overlay obstructs page and element inspector

BUG=302862
R=vsevik@chromium.org

Review URL: https://codereview.chromium.org/40233006

git-svn-id: svn://svn.chromium.org/blink/trunk@160559 bbb929c8-8fbe-4397-9dbb-9b2b20218538
void InspectorPageAgent::loaderDetachedFromFrame(DocumentLoader* loader)
{
    HashMap<DocumentLoader*, String>::iterator iterator = m_loaderToIdentifier.find(loader);
    if (iterator != m_loaderToIdentifier.end())
        m_loaderToIdentifier.remove(iterator);
}

void InspectorPageAgent::loaderDetachedFromFrame(DocumentLoader* loader)
{
    HashMap<DocumentLoader*, String>::iterator iterator = m_loaderToIdentifier.find(loader);
    if (iterator != m_loaderToIdentifier.end())
        m_loaderToIdentifier.remove(iterator);
}
