Format all dart dev compiler files

pkg/dev_compiler/tool/input_sdk/private/interceptors.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart._interceptors;
 
 import 'dart:collection';
 import 'dart:_internal' hide Symbol;
 import 'dart:_js_helper';
 import 'dart:_foreign_helper' show JS;
@@ skipping 28 matching lines @@
   Type get runtimeType => bool;
 }
 
 /**
  * The supertype for JSString and JSArray. Used by the backend as to
  * have a type mask that contains the objects that we can use the
  * native JS [] operator and length on.
  */
 abstract class JSIndexable<E> {
   int get length;
-  E operator[](int index);
+  E operator [](int index);
 }
 
 /**
  * The interface implemented by JavaScript objects.  These are methods in
  * addition to the regular Dart Object methods like [Object.hashCode].
  *
  * This is the type that should be exported by a JavaScript interop library.
  */
-abstract class JSObject {
-}
-
+abstract class JSObject {}
 
 /**
  * Interceptor base class for JavaScript objects not recognized as some more
  * specific native type.
  */
 abstract class JavaScriptObject extends Interceptor implements JSObject {
   const JavaScriptObject();
 
   // It would be impolite to stash a property on the object.
   int get hashCode => 0;
 
   Type get runtimeType => JSObject;
 }
 
-
 /**
  * Interceptor for plain JavaScript objects created as JavaScript object
  * literals or `new Object()`.
  */
 class PlainJavaScriptObject extends JavaScriptObject {
   const PlainJavaScriptObject();
 }
 
-
 /**
  * Interceptor for unclassified JavaScript objects, typically objects with a
  * non-trivial prototype chain.
  *
  * This class also serves as a fallback for unknown JavaScript exceptions.
  */
 class UnknownJavaScriptObject extends JavaScriptObject {
   const UnknownJavaScriptObject();
 
   String toString() => JS('String', 'String(#)', this);
 }
 
 // Obsolete in dart dev compiler. Added only so that the same version of
 // dart:html can be used in dart2js an dev compiler.
 // Warning: calls to these methods need to be removed before custom elements
 // and cross-frame dom objects behave correctly in ddc.
 // See https://github.com/dart-lang/sdk/issues/28326
-findInterceptorConstructorForType(Type type) { }
-findConstructorForNativeSubclassType(Type type, String name) { }
+findInterceptorConstructorForType(Type type) {}
+findConstructorForNativeSubclassType(Type type, String name) {}
 getNativeInterceptor(object) {}
 setDispatchProperty(object, value) {}