[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::didComposite()
{
    TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "CompositeLayers", "mainFrame", mainFrame());
    if (InspectorController* ic = inspectorController())
        ic->didComposite();
}

void WebDevToolsAgentImpl::didComposite()
{
    TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "CompositeLayers", "mainFrame", mainFrame());
    if (InspectorController* ic = inspectorController())
        ic->didComposite();
}
