Adding a router class to handle messages that expect responses.

mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java

Index: mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java
diff --git a/mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java b/mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java
index 9c74fbd776d48aaf1e0ee9a6505bc101cafcf142..257f6f8749fc64f80f416bd97e36d746c87582e8 100644
--- a/mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java
+++ b/mojo/bindings/java/src/org/chromium/mojo/bindings/Connector.java
@@ -21,13 +21,6 @@ import org.chromium.mojo.system.MojoResult;
 public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle> {
 
     /**
-     * An {@link ErrorHandler} is notified of error happening while using the message pipe.
-     */
-    interface ErrorHandler {
-        public void onError(MojoException e);
-    }
-
-    /**
      * The callback that is notified when the state of the owned handle changes.
      */
     private final AsyncWaiterCallback mAsyncWaiterCallback = new AsyncWaiterCallback();
@@ -55,14 +48,14 @@ public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle
     /**
      * The error handler to notify of errors.
      */
-    private ErrorHandler mErrorHandler;
+    private ConnectionErrorHandler mErrorHandler;
 
     /**
      * Create a new connector over a |messagePipeHandle|. The created connector will use the default
      * {@link AsyncWaiter} from the {@link Core} implementation of |messagePipeHandle|.
      */
     public Connector(MessagePipeHandle messagePipeHandle) {
-        this(messagePipeHandle, getDefaultAsyncWaiterForMessagePipe(messagePipeHandle));
+        this(messagePipeHandle, BindingsHelper.getDefaultAsyncWaiterForHandle(messagePipeHandle));
     }
 
     /**
@@ -83,9 +76,10 @@ public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle
     }
 
     /**
-     * Set the {@link ErrorHandler} that will be notified of errors on the owned message pipe.
+     * Set the {@link ConnectionErrorHandler} that will be notified of errors on the owned message
+     * pipe.
      */
-    public void setErrorHandler(ErrorHandler errorHandler) {
+    public void setErrorHandler(ConnectionErrorHandler errorHandler) {
         mErrorHandler = errorHandler;
     }
 
@@ -133,15 +127,6 @@ public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle
         mMessagePipeHandle.close();
     }
 
-    private static AsyncWaiter getDefaultAsyncWaiterForMessagePipe(
-            MessagePipeHandle messagePipeHandle) {
-        if (messagePipeHandle.getCore() != null) {
-            return messagePipeHandle.getCore().getDefaultAsyncWaiter();
-        } else {
-            return null;
-        }
-    }
-
     private class AsyncWaiterCallback implements AsyncWaiter.Callback {
 
         /**
@@ -178,7 +163,7 @@ public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle
         mCancellable = null;
         close();
         if (mErrorHandler != null) {
-            mErrorHandler.onError(exception);
+            mErrorHandler.onConnectionError(exception);
         }
     }
 
@@ -222,5 +207,4 @@ public class Connector implements MessageReceiver, HandleOwner<MessagePipeHandle
             mCancellable = null;
         }
     }
-
-}
+}