Add support for external out-of-process PPAPI plugins in the browser.

content/renderer/pepper/pepper_plugin_delegate_impl.h

Index: content/renderer/pepper/pepper_plugin_delegate_impl.h
===================================================================
--- content/renderer/pepper/pepper_plugin_delegate_impl.h	(revision 166155)
+++ content/renderer/pepper/pepper_plugin_delegate_impl.h	(working copy)
@@ -477,7 +477,8 @@
       const FilePath& path,
       ppapi::PpapiPermissions permissions,
       const IPC::ChannelHandle& channel_handle,
-      int plugin_child_id);
+      int plugin_child_id,
+      bool is_external);
 
   // ContextMenuClient implementation.
   virtual void OnMenuAction(int request_id, unsigned action) OVERRIDE;