Revert 143656 - Add an IPC channel between the NaCl loader process and the renderer.
BUG=116317
TEST=ppapi, nacl tests, manual testing for experimental IPC proxy.
Review URL: https://chromiumcodereview.appspot.com/10641016

TBR=bbudge@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10625007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@143665 0039d316-1c4b-4281-b951-d872f2087c98
  bool QueryKnownToValidate(const std::string& signature) {
    bool result = false;
    if (!listener_->Send(new NaClProcessMsg_QueryKnownToValidate(signature,
                                                                 &result))) {
      LOG(ERROR) << "Failed to query NaCl validation cache.";
      result = false;
    }
    return result;
  }

  bool QueryKnownToValidate(const std::string& signature) {
    bool result = false;
    if (!listener_->Send(new NaClProcessMsg_QueryKnownToValidate(signature,
                                                                 &result))) {
      LOG(ERROR) << "Failed to query NaCl validation cache.";
      result = false;
    }
    return result;
  }
