Move existing Mojo JS <--> CPP tests out of webui test harness.

mojo/apps/js/test/js_to_cpp_unittest.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define("mojo/apps/js/test/js_to_cpp_unittest", [
-    'mojo/public/js/bindings/connection',
-    "mojo/public/interfaces/bindings/tests/sample_interfaces.mojom",
-], function(connector, provider) {
-  var connection;
+    "mojo/public/js/bindings/connection",
+    "mojo/public/interfaces/bindings/tests/js_to_cpp.mojom",
+], function(connector, jsToCpp) {
+  var connection, kIterations = 100, kBadValue = 13;
 
-  function ProviderClientConnection(provider) {
-    this.provider_ = provider;
-    provider.echoString("message");
+  function JsSideConnection(cppSide) {
+    this.cppSide_ = cppSide;
+    cppSide.startTest();
   }
 
-  ProviderClientConnection.prototype =
-    Object.create(provider.ProviderClientStub.prototype);
+  JsSideConnection.prototype = Object.create(jsToCpp.JsSideStub.prototype);
+
+  JsSideConnection.prototype.ping = function (arg) {
+    this.cppSide_.pingResponse();
+
+  };
+
+  JsSideConnection.prototype.echo = function (arg) {
+    var i, arg2;
+
+    // Ensure negative values are negative.
+    if (arg.si64 > 0)
+      arg.si64 = kBadValue;
+
+    if (arg.si32 > 0)
+      arg.si32 = kBadValue;
+
+    if (arg.si16 > 0)
+      arg.si16 = kBadValue;
+
+    if (arg.si8 > 0)
+      arg.si8 = kBadValue;
+
+    for (i = 0; i < kIterations; ++i) {
+      arg2 = new jsToCpp.EchoArgs();
+      arg2.si64 = -1;
+      arg2.si32 = -1;
+      arg2.si16 = -1;
+      arg2.si8 = -1;
+      arg2.name = "going";
+      this.cppSide_.echoResponse(arg, arg2);
+    }
+  };
 
   return function(handle) {
-    connection = new connector.Connection(handle, ProviderClientConnection,
-                                          provider.ProviderProxy);
+    connection = new connector.Connection(handle, JsSideConnection,
+                                          jsToCpp.CppSideProxy);
   };
 });