Revert of Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

third_party/WebKit/LayoutTests/mojo/binding.html

Index: third_party/WebKit/LayoutTests/mojo/binding.html
diff --git a/third_party/WebKit/LayoutTests/mojo/binding.html b/third_party/WebKit/LayoutTests/mojo/binding.html
index e65fda0fcce6734d91eb9e5a7fbc2f2826bfbf9a..f04de81efb751d602118da27daf51cac19a48805 100644
--- a/third_party/WebKit/LayoutTests/mojo/binding.html
+++ b/third_party/WebKit/LayoutTests/mojo/binding.html
@@ -82,22 +82,6 @@
   var calcBinding = new bindings.Binding(math.Calculator,
                                          new CalculatorImpl(),
                                          bindings.makeRequest(calc));
-
-  await new Promise((resolve, reject) => {
-    calcBinding.setConnectionErrorHandler(({custom_reason, description}) => {
-      assert_equals(custom_reason, 32);
-      assert_equals(description, 'goodbye');
-      resolve();
-    });
-    calc.ptr.resetWithReason({custom_reason: 32, description: 'goodbye'});
-  });
-}, 'connection error with reason');
-
-binding_test(async (bindings, math) => {
-  var calc = new math.CalculatorPtr();
-  var calcBinding = new bindings.Binding(math.Calculator,
-                                         new CalculatorImpl(),
-                                         bindings.makeRequest(calc));
   assert_equals((await calc.add(2)).value, 2);
 
   var interfaceRequest = calcBinding.unbind();