Add a PepperHelper::EnablePepperSupportForChannel function to content.

content/browser/pepper_helper.cc

Index: content/browser/pepper_helper.cc
===================================================================
--- content/browser/pepper_helper.cc	(revision 0)
+++ content/browser/pepper_helper.cc	(revision 0)
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/public/browser/pepper_helper.h"
+
+#include "content/browser/renderer_host/pepper/pepper_message_filter.h"
+#include "ipc/ipc_channel_proxy.h"
+#include "net/base/host_resolver.h"
+
+namespace content {
+
+void EnablePepperSupportForChannel(IPC::ChannelProxy* channel,
+                                   net::HostResolver* host_resolver) {
+  channel->AddFilter(
+      new PepperMessageFilter(PepperMessageFilter::PLUGIN, host_resolver));
+}
+
+}  // namespace content
+