Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

mojo/public/js/tests/interface_ptr_unittest.js

Index: mojo/public/js/tests/interface_ptr_unittest.js
diff --git a/mojo/public/js/tests/interface_ptr_unittest.js b/mojo/public/js/tests/interface_ptr_unittest.js
index 6203154d204c96c2e24cc7bf348446a49a627f56..86003dea1affd607b6579a02e064b66a2316dd47 100644
--- a/mojo/public/js/tests/interface_ptr_unittest.js
+++ b/mojo/public/js/tests/interface_ptr_unittest.js
@@ -21,6 +21,8 @@ define([
       .then(testEndToEnd)
       .then(testReusable)
       .then(testConnectionError)
+      .then(testConnectionErrorWithReason)
+      .then(testResetWithReason)
       .then(testPassInterface)
       .then(testBindRawHandle)
       .then(testQueryVersion)
@@ -137,6 +139,44 @@ define([
     return promise;
   }
 
+  function testConnectionErrorWithReason() {
+    var calc = new math.CalculatorPtr();
+    var calcBinding = new bindings.Binding(math.Calculator,
+                                           new CalculatorImpl(),
+                                           bindings.makeRequest(calc));
+
+    var promise = new Promise(function(resolve, reject) {
+      calc.ptr.setConnectionErrorHandler(function({custom_reason,
+          description}) {
+        expect(custom_reason).toBe(42);
+        expect(description).toBe('hey');
+        resolve();
+      });
+      calcBinding.closeWithReason({custom_reason: 42, description: 'hey'});
+    });
+
+    return promise;
+  }
+
+  function testResetWithReason() {
+    var calc = new math.CalculatorPtr();
+    var calcBinding = new bindings.Binding(math.Calculator,
+                                           new CalculatorImpl(),
+                                           bindings.makeRequest(calc));
+
+    var promise = new Promise(function(resolve, reject) {
+      calcBinding.setConnectionErrorHandler(function({custom_reason,
+          description}) {
+        expect(custom_reason).toBe(32);
+        expect(description).toBe('goodbye');
+        resolve();
+      });
+      calc.ptr.resetWithReason({custom_reason: 32, description: 'goodbye'});
+    });
+
+    return promise;
+  }
+
   function testPassInterface() {
     var calc = new math.CalculatorPtr();
     var newCalc = null;