Revert "Remove Compiler.assembledCode."

pkg/compiler/lib/src/js_emitter/code_emitter_task.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.
 
 part of dart2js.js_emitter;
 
 const USE_NEW_EMITTER = const bool.fromEnvironment("dart2js.use.new.emitter");
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
@@ skipping 372 matching lines @@
     // Compute the required type checks to know which classes need a
     // 'is$' method.
     typeTestRegistry.computeRequiredTypeChecks();
 
     computeNeededDeclarations();
     computeNeededConstants();
     computeNeededStatics();
     computeNeededLibraries();
   }
 
-  int assembleProgram() {
-    return measure(() {
+  void assembleProgram() {
+    measure(() {
       emitter.invalidateCaches();
 
       computeAllNeededEntities();
 
       Program program;
       if (USE_NEW_EMITTER) {
         program = new ProgramBuilder(compiler, namer, this).buildProgram();
       }
-      return emitter.emitProgram(program);
+      emitter.emitProgram(program);
     });
   }
 }
 
 abstract class Emitter {
-  /// Emits [program] and returns the size of the generated output.
-  int emitProgram(Program program);
+  void emitProgram(Program program);
 
   /// Returns the JS function that must be invoked to get the value of the
   /// lazily initialized static.
   jsAst.Expression isolateLazyInitializerAccess(FieldElement element);
 
   /// Returns the closure expression of a static function.
   jsAst.Expression isolateStaticClosureAccess(FunctionElement element);
 
   /// Returns the JS code for accessing the embedded [global].
   jsAst.Expression generateEmbeddedGlobalAccess(String global);
@@ skipping 15 matching lines @@
 
   /// Returns the JS prototype of the given class [e].
   jsAst.Expression prototypeAccess(ClassElement e, bool hasBeenInstantiated);
 
   /// Returns the JS constructor of the given interceptor class [e].
   jsAst.Expression interceptorClassAccess(ClassElement e);
 
   /// Returns the JS expression representing the type [e].
   jsAst.Expression typeAccess(Element e);
 
+
   int compareConstants(ConstantValue a, ConstantValue b);
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant);
 
   void invalidateCaches();
 }