Initialize the deferred global for every fragment.

pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart b/pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart
index 7fbd768820923fa63483f2f4c8995a5a128d231a..14dea34b877f1f462c89b5a9933a7188c4dac3a7 100644
--- a/pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart
@@ -55,11 +55,6 @@ const String cachedClassFieldNames = r'$cachedFieldNames';
 // names we want. Furthermore, the pretty-printer minifies local variables, thus
 // reducing their size.
 const String mainBoilerplate = '''
-{
-// Declare deferred-initializer global, which is used to keep track of the
-// loaded fragments.
-#deferredInitializer;
-
 (function() {
 // Copies the own properties from [from] to [to].
 function copyProperties(from, to) {
@@ -355,8 +350,8 @@ var #staticStateDeclaration = {};
 
 // Invokes main (making sure that it records the 'current-script' value).
 #invokeMain;
-})();
-}''';
+})()
+''';
 
 /// Deferred fragments (aka 'hunks') are built similarly to the main fragment.
 ///
@@ -441,8 +436,7 @@ class FragmentEmitter {
         .where((Holder holder) => !holder.isStaticStateHolder);
 
     return js.js.statement(mainBoilerplate,
-        {'deferredInitializer': emitDeferredInitializerGlobal(program.loadMap),
-         'typeNameProperty': js.string(ModelEmitter.typeNameProperty),
+        {'typeNameProperty': js.string(ModelEmitter.typeNameProperty),
          'cyclicThrow': backend.emitter.staticFunctionAccess(
                  backend.helpers.cyclicThrowHelper),
          'operatorIsPrefix': js.string(namer.operatorIsPrefix),
@@ -516,15 +510,6 @@ class FragmentEmitter {
     });
   }
 
-  js.Statement emitDeferredInitializerGlobal(Map loadMap) {
-    if (loadMap.isEmpty) return new js.Block.empty();
-
-    String global = ModelEmitter.deferredInitializersGlobal;
-    return js.js.statement(
-        "if (typeof($global) === 'undefined') var # = Object.create(null);",
-        new js.VariableDeclaration(global, allowRename: false));
-  }
-
   /// Emits all holders, except for the static-state holder.
   ///
   /// The emitted holders contain classes (only the constructors) and all