fix(compiler): remove manual controllerAs logic (#9462)

Currently the `controllerAs` logic in the compiler is done manually, however the same result can be achieved by passing the `controllerAs` value to the `$controller` factory.

Author: crisbeto

src/core/services/compiler/compiler.js

@@ -114,7 +114,7 @@ function mdCompilerService($q, $templateRequest, $injector, $compile, $controlle
 
           //Instantiate controller if it exists, because we have scope
           if (controller) {
-            var invokeCtrl = $controller(controller, locals, true);
+            var invokeCtrl = $controller(controller, locals, true, controllerAs);
             if (bindToController) {
               angular.extend(invokeCtrl.instance, locals);
             }
@@ -123,10 +123,6 @@ function mdCompilerService($q, $templateRequest, $injector, $compile, $controlle
             element.data('$ngControllerController', ctrl);
             element.children().data('$ngControllerController', ctrl);
 
-            if (controllerAs) {
-              scope[controllerAs] = ctrl;
-            }
-
             // Publish reference to this controller
             compiledData.controller = ctrl;
           }