Revert of Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

mojo/public/js/codec.js

Index: mojo/public/js/codec.js
diff --git a/mojo/public/js/codec.js b/mojo/public/js/codec.js
index ce58a8cfd4aea874d6b752d9f8efe47f28268037..ff5d31a08e5fef423d1a2f2230377bbdf8b8d8ec 100644
--- a/mojo/public/js/codec.js
+++ b/mojo/public/js/codec.js
@@ -453,10 +453,6 @@
     return this.buffer.getUint32(kMessageFlagsOffset);
   };
 
-  Message.prototype.getInterfaceId = function() {
-    return this.buffer.getUint32(kMessageInterfaceIdOffset);
-  };
-
   Message.prototype.isResponse = function() {
     return (this.getFlags() & kMessageIsResponse) != 0;
   };
@@ -468,10 +464,6 @@
   Message.prototype.setRequestID = function(requestID) {
     // TODO(darin): Verify that space was reserved for this field!
     this.buffer.setUint64(kMessageRequestIDOffset, requestID);
-  };
-
-  Message.prototype.setInterfaceId = function(interfaceId) {
-    this.buffer.setUint32(kMessageInterfaceIdOffset, interfaceId);
   };
 
 
@@ -545,6 +537,10 @@
     this.payloadSize = message.buffer.byteLength - messageHeaderSize;
     var version = this.decoder.readUint32();
     var interface_id = this.decoder.readUint32();
+    if (interface_id != 0) {
+      throw new Error("Receiving non-zero interface ID. Associated interfaces " +
+                      "are not yet supported.");
+    }
     this.messageName = this.decoder.readUint32();
     this.flags = this.decoder.readUint32();
     // Skip the padding.