feat(change_detection): change binding syntax to explicitly specify pipes

modules/angular2/src/change_detection/pipes/array_changes.js

@@ -16,6 +16,16 @@ import {
 
 import {NO_CHANGE, Pipe} from './pipe';
 
+export class ArrayChangesFactory {
+  supports(obj):boolean {
+    return ArrayChanges.supportsObj(obj);
+  }
+
+  create():Pipe {
+    return new ArrayChanges();
+  }
+}
+
 export class ArrayChanges extends Pipe {
   _collection;
   _length:int;

modules/angular2/src/change_detection/pipes/null_pipe.js

@@ -1,6 +1,16 @@
 import {isBlank} from 'angular2/src/facade/lang';
 import {Pipe, NO_CHANGE} from './pipe';
 
+export class NullPipeFactory {
+  supports(obj):boolean {
+    return NullPipe.supportsObj(obj);
+  }
+
+  create():Pipe {
+    return new NullPipe();
+  }
+}
+
 export class NullPipe extends Pipe {
   called:boolean;
   constructor() {

modules/angular2/src/change_detection/pipes/pipe_registry.js

@@ -16,12 +16,12 @@ export class PipeRegistry {
     }
 
     var matchingConfig = ListWrapper.find(listOfConfigs,
-      (pipeConfig) => pipeConfig["supports"](obj));
+      (pipeConfig) => pipeConfig.supports(obj));
 
     if (isBlank(matchingConfig)) {
       throw new BaseException(`Cannot find a pipe for type '${type}' object '${obj}'`);
     }
 
-    return matchingConfig["pipe"]();
+    return matchingConfig.create();
   }
 }