Revert of Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

third_party/WebKit/LayoutTests/mojo/interface_ptr.html

Index: third_party/WebKit/LayoutTests/mojo/interface_ptr.html
diff --git a/third_party/WebKit/LayoutTests/mojo/interface_ptr.html b/third_party/WebKit/LayoutTests/mojo/interface_ptr.html
index 295461ac0c7cf486c4236572d14d35d5abac0bea..26751f4d046d894a68fd2c44bf75816c697bafa2 100644
--- a/third_party/WebKit/LayoutTests/mojo/interface_ptr.html
+++ b/third_party/WebKit/LayoutTests/mojo/interface_ptr.html
@@ -97,22 +97,6 @@
 
   promise_test(async () => {
     var calc = new math.CalculatorPtr();
-    var calcBinding = new bindings.Binding(math.Calculator,
-                                           new CalculatorImpl(),
-                                           bindings.makeRequest(calc));
-
-    await new Promise((resolve, reject) => {
-      calc.ptr.setConnectionErrorHandler(({custom_reason, description}) => {
-        assert_equals(custom_reason, 42);
-        assert_equals(description, 'hey');
-        resolve();
-      });
-      calcBinding.closeWithReason({custom_reason: 42, description: 'hey'});
-    });
-  }, 'connection error with reason');
-
-  promise_test(async () => {
-    var calc = new math.CalculatorPtr();
     var newCalc = null;
     var calcBinding = new bindings.Binding(math.Calculator,
                                            new CalculatorImpl(),