Update mojo sdk to rev 1dc8a9a5db73d3718d99917fadf31f5fb2ebad4f

third_party/mojo/src/mojo/public/dart/lib/src/codec.dart

Index: third_party/mojo/src/mojo/public/dart/lib/src/codec.dart
diff --git a/third_party/mojo/src/mojo/public/dart/src/codec.dart b/third_party/mojo/src/mojo/public/dart/lib/src/codec.dart
similarity index 98%
rename from third_party/mojo/src/mojo/public/dart/src/codec.dart
rename to third_party/mojo/src/mojo/public/dart/lib/src/codec.dart
index 89e32c279ba75e4d2ec7b6eabcfd715c4a181821..07bad358bbff0ad229c4f4a464f3b970cbd5dafd 100644
--- a/third_party/mojo/src/mojo/public/dart/src/codec.dart
+++ b/third_party/mojo/src/mojo/public/dart/lib/src/codec.dart
@@ -201,11 +201,10 @@ class Encoder {
 
   void encodeInterface(
       core.MojoEventStreamListener interface, int offset, bool nullable) {
-    // Set the version field to 0 for now.
-    encodeUint32(0, offset + kSerializedHandleSize);
-
     if (interface == null) {
       encodeInvalideHandle(offset, nullable);
+      // Set the version field to 0.
+      encodeUint32(0, offset + kSerializedHandleSize);
       return;
     }
     if (interface is Stub) {
@@ -214,6 +213,8 @@ class Encoder {
       interface.bind(pipe.endpoints[0]);
       interface.listen();
       encodeMessagePipeHandle(pipe.endpoints[1], offset, nullable);
+      // Set the version to the version in the stub.
+      encodeUint32(interface.version, offset + kSerializedHandleSize);
     } else if (interface is Proxy) {
       assert(interface.isBound);
       if (!interface.isOpen) {
@@ -222,6 +223,8 @@ class Encoder {
         interface.listen();
       }
       encodeMessagePipeHandle(interface.endpoint, offset, nullable);
+      // Set the version to the current version of the proxy.
+      encodeUint32(interface.version, offset + kSerializedHandleSize);
     } else {
       throw new MojoCodecError(
           'Trying to encode an unknown MojoEventStreamListener');
@@ -594,9 +597,14 @@ class Decoder {
 
   ProxyBase decodeServiceInterface(
       int offset, bool nullable, Function clientFactory) {
-    // Ignore the version field for now.
     var endpoint = decodeMessagePipeHandle(offset, nullable);
-    return endpoint.handle.isValid ? clientFactory(endpoint) : null;
+    var version = decodeUint32(offset + kSerializedHandleSize);
+    if (!endpoint.handle.isValid) {
+      return null;
+    }
+    ProxyBase client = clientFactory(endpoint);
+    client.impl._version = version;
+    return client;
   }
 
   Stub decodeInterfaceRequest(