Enable Blink to pass extra Mojo handles across MessagePorts

content/child/webmessageportchannel_impl.h

Index: content/child/webmessageportchannel_impl.h
diff --git a/content/child/webmessageportchannel_impl.h b/content/child/webmessageportchannel_impl.h
index 70a04b1766171f0fbba35cce72e53a9257011904..634d9e2d0f646ff214df057f636bb542967400fc 100644
--- a/content/child/webmessageportchannel_impl.h
+++ b/content/child/webmessageportchannel_impl.h
@@ -42,9 +42,11 @@ class WebMessagePortChannelImpl : public blink::WebMessagePortChannel {
   // WebMessagePortChannel implementation.
   void setClient(blink::WebMessagePortChannelClient* client) override;
   void postMessage(const blink::WebString& encoded_message,
-                   blink::WebMessagePortChannelArray channels) override;
+                   blink::WebMessagePortChannelArray channels,
+                   blink::WebVector<mojo::ScopedHandle> handles) override;
   bool tryGetMessage(blink::WebString* encoded_message,
-                     blink::WebMessagePortChannelArray& channels) override;
+                     blink::WebMessagePortChannelArray& channels,
+                     blink::WebVector<mojo::ScopedHandle>& handles) override;
 
   MessagePort port_;