Add a PepperHelper::EnablePepperSupportForChannel function to content.

content/public/browser/pepper_helper.h

Index: content/public/browser/pepper_helper.h
===================================================================
--- content/public/browser/pepper_helper.h	(revision 0)
+++ content/public/browser/pepper_helper.h	(revision 0)
@@ -0,0 +1,27 @@
+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_PEPPER_HELPER_H_
+#define CONTENT_PUBLIC_BROWSER_PEPPER_HELPER_H_
+
+#include "content/common/content_export.h"
+
+namespace IPC {
+class ChannelProxy;
+}
+namespace net {
+class HostResolver;
+}
+
+namespace content {
+
+// Enables dispatching PPAPI messages from the plugin to the browser.
+CONTENT_EXPORT void EnablePepperSupportForChannel(
+    IPC::ChannelProxy* channel,
+    net::HostResolver* host_resolver);
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_PEPPER_HELPER_H_
+