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

content/test/data/web_ui_mojo.js

Index: content/test/data/web_ui_mojo.js
diff --git a/content/test/data/web_ui_mojo.js b/content/test/data/web_ui_mojo.js
index 3dc32293cf1aa17aaca0a48f931f1ca44ab9244b..086dc0041252bc901e67f7708a6d92436c7324b8 100644
--- a/content/test/data/web_ui_mojo.js
+++ b/content/test/data/web_ui_mojo.js
@@ -6,7 +6,7 @@ define('main', [
     'mojo/public/js/bindings/connection',
     'content/test/data/web_ui_test_mojo_bindings.mojom',
 ], function (connection, bindings) {
-  var retainedConnection, kIterations = 100, kBadValue = 13;
+  var retainedConnection;
 
   function RendererTargetTest(bindings) {
     this.bindings_ = bindings;
@@ -23,33 +23,6 @@ define('main', [
     this.bindings_.pingResponse();
   };
 
-  RendererTargetTest.prototype.echo = function (arg) {
-    var i;
-
-    // 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 bindings.EchoArgs();
-      arg2.si64 = -1;
-      arg2.si32 = -1;
-      arg2.si16 = -1;
-      arg2.si8 = -1;
-      arg2.name = "going";
-      this.bindings_.echoResponse(arg, arg2);
-    }
-  };
-
   return function(handle) {
     retainedConnection = new connection.Connection(
         handle, RendererTargetTest, bindings.BrowserTargetProxy);