Revert "Remove Compiler.assembledCode."

pkg/compiler/lib/src/js_emitter/code_emitter_task.dart

Index: pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
diff --git a/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart b/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
index 01c596381a30075f99227517986acd5a992b4ca4..ad620a4e67a60b24ac9597166b599e6b9df3c8da 100644
--- a/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
+++ b/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
@@ -390,8 +390,8 @@ class CodeEmitterTask extends CompilerTask {
     computeNeededLibraries();
   }
 
-  int assembleProgram() {
-    return measure(() {
+  void assembleProgram() {
+    measure(() {
       emitter.invalidateCaches();
 
       computeAllNeededEntities();
@@ -400,14 +400,13 @@ class CodeEmitterTask extends CompilerTask {
       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.
@@ -443,6 +442,7 @@ abstract class Emitter {
   /// Returns the JS expression representing the type [e].
   jsAst.Expression typeAccess(Element e);
 
+
   int compareConstants(ConstantValue a, ConstantValue b);
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant);