Enable Blink to pass extra Mojo handles across MessagePorts

content/common/message_port.h

Index: content/common/message_port.h
diff --git a/content/common/message_port.h b/content/common/message_port.h
index d3d198c4fd25a6f92305c328ff7c5a6895856070..d65a81b9b7be448c50ff4e4927eae899a65217c1 100644
--- a/content/common/message_port.h
+++ b/content/common/message_port.h
@@ -61,12 +61,14 @@ class CONTENT_EXPORT MessagePort {
   // Sends an encoded message (along with ports to transfer) to this port's
   // peer.
   void PostMessage(const base::string16& encoded_message,
-                   std::vector<MessagePort> ports);
+                   std::vector<MessagePort> ports,
+                   std::vector<mojo::ScopedHandle> extra_handles);
 
   // Get the next available encoded message if any. Returns true if a message
   // was read.
   bool GetMessage(base::string16* encoded_message,
-                  std::vector<MessagePort>* ports);
+                  std::vector<MessagePort>* ports,
+                  std::vector<mojo::ScopedHandle>* extra_handles);
 
   // This callback will be invoked on a background thread when messages are
   // available to be read via GetMessage.