refactor(ElementInjector): support components

- Allow to access containing component directive instance from the shadow DOM.
- Allow to access app services of the app level injector of the component
  when the component is instantiated.

modules/benchmarks/src/element_injector/instantiate_benchmark.js

@@ -10,8 +10,8 @@ export function run () {
   var bindings = [A, B, C];
   var proto = new ProtoElementInjector(null, 0, bindings);
   for (var i = 0; i < ITERATIONS; ++i) {
-    var ei = proto.instantiate(null,null);
-    ei.instantiateDirectives(appInjector);
+    var ei = proto.instantiate(null,null,null);
+    ei.instantiateDirectives(appInjector, null);
   }
 }
 

modules/benchmarks/src/element_injector/instantiate_benchmark_codegen.js

@@ -6,7 +6,7 @@ var count = 0;
 
 export function run () {
   var appInjector = new Injector([]);
-  
+
   var bindings = [
     new Binding(Key.get(A), () => new A(), [], false),
     new Binding(Key.get(B), () => new B(), [], false),
@@ -18,8 +18,8 @@ export function run () {
 
   var proto = new ProtoElementInjector(null, 0, bindings);
   for (var i = 0; i < ITERATIONS; ++i) {
-    var ei = proto.instantiate(null,null);
-    ei.instantiateDirectives(appInjector);
+    var ei = proto.instantiate(null,null,null);
+    ei.instantiateDirectives(appInjector, null);
   }
 }
 

modules/benchmarks/src/element_injector/instantiate_directive_benchmark.js

@@ -9,11 +9,11 @@ export function run () {
 
   var bindings = [A, B, C];
   var proto = new ProtoElementInjector(null, 0, bindings);
-  var ei = proto.instantiate(null,null);
+  var ei = proto.instantiate(null,null,null);
 
   for (var i = 0; i < ITERATIONS; ++i) {
     ei.clearDirectives();
-    ei.instantiateDirectives(appInjector);
+    ei.instantiateDirectives(appInjector, null);
   }
 }