Revert of Mojo JS bindings: switch most usage of "connection"/"router" module to "bindings".

extensions/test/data/api_test_base_unittest.js

Index: extensions/test/data/api_test_base_unittest.js
diff --git a/extensions/test/data/api_test_base_unittest.js b/extensions/test/data/api_test_base_unittest.js
index 094a623968110292ce76abeff5ee517125a7cc75..6aa8b7819c2d19efb806f97db1094c4ade1e3ba9 100644
--- a/extensions/test/data/api_test_base_unittest.js
+++ b/extensions/test/data/api_test_base_unittest.js
@@ -36,14 +36,14 @@
   },
   function testMojoModulesAreAvailable() {
     Promise.all([
-      requireAsync('mojo/public/js/bindings'),
+      requireAsync('mojo/public/js/connection'),
       requireAsync('mojo/public/js/core'),
       requireAsync('content/public/renderer/frame_interfaces'),
     ]).then(test.callback(function(modules) {
-      var bindings = modules[0];
+      var connection = modules[0];
       var core = modules[1];
       var frameInterfaces = modules[2];
-      test.assertTrue(!!bindings.Binding);
+      test.assertTrue(!!connection.Connection);
       test.assertTrue(!!core.createMessagePipe);
       test.assertTrue(!!frameInterfaces.getInterface);
     }));