DevTools: move DevToolsAgent/Client into content.

BUG=84078
TEST=

Review URL: http://codereview.chromium.org/7461019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93596 0039d316-1c4b-4281-b951-d872f2087c98
void BrowserRenderProcessHost::OnShutdownRequest() {
  if (pending_views_)
    return;

  NotificationService::current()->Notify(
      content::NOTIFICATION_RENDERER_PROCESS_CLOSING,
      Source<RenderProcessHost>(this), NotificationService::NoDetails());

  Send(new ChildProcessMsg_Shutdown());
}

void BrowserRenderProcessHost::OnShutdownRequest() {
  if (pending_views_)
    return;

  NotificationService::current()->Notify(
      content::NOTIFICATION_RENDERER_PROCESS_CLOSING,
      Source<RenderProcessHost>(this), NotificationService::NoDetails());

  Send(new ChildProcessMsg_Shutdown());
}
