[4/4] Process clearBrowserCahce/cookies commands in browser.

BUG=366585

Review URL: https://codereview.chromium.org/251183005

git-svn-id: svn://svn.chromium.org/blink/trunk@172984 bbb929c8-8fbe-4397-9dbb-9b2b20218538
void WebDevToolsAgentImpl::detach()
{
    blink::Platform::current()->currentThread()->removeTaskObserver(this);

    InspectorController* ic = inspectorController();
    ic->disconnectFrontend();
    m_attached = false;
}

void WebDevToolsAgentImpl::detach()
{
    blink::Platform::current()->currentThread()->removeTaskObserver(this);

    InspectorController* ic = inspectorController();
    ic->disconnectFrontend();
    m_attached = false;
}
