[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 InspectorController::willBeDestroyed()
{
    disconnectFrontend();
    m_injectedScriptManager->disconnect();
    m_inspectorClient = 0;
    m_page = 0;
    m_instrumentingAgents->reset();
    m_agents.discardAgents();
}

void InspectorController::willBeDestroyed()
{
    disconnectFrontend();
    m_injectedScriptManager->disconnect();
    m_inspectorClient = 0;
    m_page = 0;
    m_instrumentingAgents->reset();
    m_agents.discardAgents();
}
