Revert "Remove Compiler.assembledCode."

pkg/compiler/lib/src/dump_info.dart

Index: pkg/compiler/lib/src/dump_info.dart
diff --git a/pkg/compiler/lib/src/dump_info.dart b/pkg/compiler/lib/src/dump_info.dart
index b2442b911157e36f8f31120342e2c09a77ccf7f3..c59ea596ab48213d27935bc65f222db80e3eed4b 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -86,12 +86,20 @@ class ElementToJsonVisitor extends ElementVisitor<Map<String, dynamic>> {
 
   final Map<Element, Map<String, dynamic>> jsonCache = {};
 
+  int programSize;
   String dart2jsVersion;
 
   ElementToJsonVisitor(this.compiler);
 
   void run() {
     Backend backend = compiler.backend;
+    if (backend is JavaScriptBackend) {
+      // Add up the sizes of all output-buffers.
+      programSize = backend.emitter.oldEmitter.outputBuffers.values.fold(0,
+          (a, b) => a + b.length);
+    } else {
+      programSize = compiler.assembledCode.length;
+    }
 
     dart2jsVersion = compiler.hasBuildId ? compiler.buildId : null;
 
@@ -397,9 +405,6 @@ class DumpInfoTask extends CompilerTask {
 
   ElementToJsonVisitor infoCollector;
 
-  /// The size of the generated output.
-  int _programSize;
-
   // A set of javascript AST nodes that we care about the size of.
   // This set is automatically populated when registerElementAst()
   // is called.
@@ -419,11 +424,6 @@ class DumpInfoTask extends CompilerTask {
   // inlined inside of it.
   final Map<Element, List<Element>> inlineMap = <Element, List<Element>>{};
 
-  /// Register the size of the generated output.
-  void reportSize(int programSize) {
-    _programSize = programSize;
-  }
-
   void registerInlined(Element element, Element inlinedFrom) {
     inlineCount.putIfAbsent(element, () => 0);
     inlineCount[element] += 1;
@@ -644,7 +644,7 @@ class DumpInfoTask extends CompilerTask {
     Duration toJsonDuration = new DateTime.now().difference(startToJsonTime);
 
     Map<String, dynamic> generalProgramInfo = <String, dynamic> {
-      'size': _programSize,
+      'size': infoCollector.programSize,
       'dart2jsVersion': infoCollector.dart2jsVersion,
       'compilationMoment': new DateTime.now().toString(),
       'compilationDuration': compiler.totalCompileTime.elapsed.toString(),