chore(ngUpgrade): Move into Angular2

This is moving ngUpgrade into the main repository per #4838.
The ngUpgrade is published from the main import consistent with
https://docs.google.com/document/d/1rbVTKTYLz6p2smQNYI8h4-QN-m2PS6F3iQIDmSzn0Ww/edit#heading=h.6cxvr9awtf5r
Closes #4931

modules/angular2/test/upgrade/metadata_spec.ts

@@ -0,0 +1,81 @@
+import {
+  AsyncTestCompleter,
+  beforeEach,
+  ddescribe,
+  describe,
+  expect,
+  iit,
+  inject,
+  it,
+  xdescribe,
+  xit,
+} from 'angular2/testing_internal';
+
+import {Component, View} from 'angular2/angular2';
+import {getComponentInfo, parseFields} from 'angular2/src/upgrade/metadata';
+import {DOM} from 'angular2/src/core/dom/dom_adapter';
+
+export function main() {
+  if (!DOM.supportsDOMEvents()) return;
+  describe('upgrade metadata', () => {
+    it('should extract component selector', () => {
+      expect(getComponentInfo(ElementNameComponent).selector).toEqual('elementNameDashed');
+    });
+
+
+    describe('errors', () => {
+      it('should throw on missing selector', () => {
+        expect(() => getComponentInfo(AttributeNameComponent))
+            .toThrowErrorWith(
+                "Only selectors matching element names are supported, got: [attr-name]");
+      });
+
+      it('should throw on non element names', () => {
+        expect(() => getComponentInfo(NoAnnotationComponent))
+            .toThrowErrorWith("No Directive annotation found on NoAnnotationComponent");
+      });
+    });
+
+    describe('parseFields', () => {
+      it('should process nulls', () => { expect(parseFields(null)).toEqual([]); });
+
+      it('should process values', () => {
+        expect(parseFields([' name ', ' prop :  attr ']))
+            .toEqual([
+              {
+                prop: 'name',
+                attr: 'name',
+                bracketAttr: '[name]',
+                parenAttr: '(name)',
+                bracketParenAttr: '[(name)]',
+                onAttr: 'onName',
+                bindAttr: 'bindName',
+                bindonAttr: 'bindonName'
+              },
+              {
+                prop: 'prop',
+                attr: 'attr',
+                bracketAttr: '[attr]',
+                parenAttr: '(attr)',
+                bracketParenAttr: '[(attr)]',
+                onAttr: 'onAttr',
+                bindAttr: 'bindAttr',
+                bindonAttr: 'bindonAttr'
+              }
+            ]);
+      });
+    })
+  });
+}
+
+@Component({selector: 'element-name-dashed'})
+@View({template: ``})
+class ElementNameComponent {
+}
+
+@Component({selector: '[attr-name]'})
+@View({template: ``})
+class AttributeNameComponent {
+}
+
+class NoAnnotationComponent {}