Enable Blink to pass extra Mojo handles across MessagePorts

content/common/message_port.h

 // Copyright 2017 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_COMMON_MESSAGE_PORT_H_
 #define CONTENT_COMMON_MESSAGE_PORT_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 43 matching lines @@
 
   const mojo::ScopedMessagePipeHandle& GetHandle() const;
   mojo::ScopedMessagePipeHandle ReleaseHandle() const;
 
   static std::vector<mojo::ScopedMessagePipeHandle> ReleaseHandles(
       const std::vector<MessagePort>& ports);
 
   // 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.
   void SetCallback(const base::Closure& callback);
 
   // Clears any callback specified by a prior call to SetCallback.
   void ClearCallback();
 
  private:
   class State : public base::RefCountedThreadSafe<State> {
@@ skipping 20 matching lines @@
                                   MojoResult result,
                                   MojoHandleSignalsState signals_state,
                                   MojoWatcherNotificationFlags flags);
   };
   mutable scoped_refptr<State> state_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_MESSAGE_PORT_H_