Revert "Remove Compiler.assembledCode."

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 4646013fb6bf24eeb9adbc2abb3bdad333b56854..673fa5ba79aac85fd2d5d9284b569acc53350f70 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -273,9 +273,7 @@ abstract class Backend {
     return new native.NativeEnqueuer();
   }
 
-  /// Generates the output and returns the total size of the generated code.
-  int assembleProgram();
-
+  void assembleProgram();
   List<CompilerTask> get tasks;
 
   void onResolutionComplete() {}
@@ -629,6 +627,7 @@ abstract class Compiler implements DiagnosticListener {
   final Stopwatch totalCompileTime = new Stopwatch();
   int nextFreeClassId = 0;
   World world;
+  String assembledCode;
   Types types;
   _CompilerCoreTypes _coreTypes;
 
@@ -1080,6 +1079,8 @@ abstract class Compiler implements DiagnosticListener {
   }
 
   void internalError(Spannable node, reason) {
+    assembledCode = null; // Compilation failed. Make sure that we
+                          // don't return a bogus result.
     String message = tryToString(reason);
     reportDiagnosticInternal(
         node, MessageKind.GENERIC, {'text': message}, api.Diagnostic.CRASH);
@@ -1614,14 +1615,17 @@ abstract class Compiler implements DiagnosticListener {
 
     if (compilationFailed) return;
 
-    int programSize = backend.assembleProgram();
+    backend.assembleProgram();
 
     if (dumpInfo) {
-      dumpInfoTask.reportSize(programSize);
       dumpInfoTask.dumpInfo();
     }
 
     checkQueues();
+
+    if (compilationFailed) {
+      assembledCode = null; // Signals failure.
+    }
   }
 
   void fullyEnqueueLibrary(LibraryElement library, Enqueuer world) {