Support (de)serialization from command-line

pkg/compiler/lib/src/source_file_provider.dart

Index: pkg/compiler/lib/src/source_file_provider.dart
diff --git a/pkg/compiler/lib/src/source_file_provider.dart b/pkg/compiler/lib/src/source_file_provider.dart
index da154195c312ebffb08e74dcb87089b446ac043d..78a5802b0200b7a20ea8be4b6f2ee6c5d6dd729e 100644
--- a/pkg/compiler/lib/src/source_file_provider.dart
+++ b/pkg/compiler/lib/src/source_file_provider.dart
@@ -238,9 +238,10 @@ class FormattingDiagnosticHandler implements CompilerDiagnostics {
 
 typedef void MessageCallback(String message);
 
-class RandomAccessFileOutputProvider {
+class RandomAccessFileOutputProvider implements CompilerOutput {
   final Uri out;
   final Uri sourceMapOut;
+  final Uri serializationTarget;
   final MessageCallback onInfo;
   final MessageCallback onFailure;
 
@@ -248,7 +249,7 @@ class RandomAccessFileOutputProvider {
   List<String> allOutputFiles = new List<String>();
 
   RandomAccessFileOutputProvider(this.out, this.sourceMapOut,
-      {this.onInfo, this.onFailure});
+      {this.onInfo, this.onFailure, this.serializationTarget});
 
   static Uri computePrecompiledUri(Uri out) {
     String extension = 'precompiled.js';
@@ -262,6 +263,10 @@ class RandomAccessFileOutputProvider {
   }
 
   EventSink<String> call(String name, String extension) {
+    return createEventSink(name, extension);
+  }
+
+  EventSink<String> createEventSink(String name, String extension) {
     Uri uri;
     bool isPrimaryOutput = false;
     // TODO (johnniwinther, sigurdm): Make a better interface for
@@ -278,9 +283,14 @@ class RandomAccessFileOutputProvider {
             " \"Content-Security-Policy: script-src 'self'\"");
       } else if (extension == 'js.map' || extension == 'dart.map') {
         uri = sourceMapOut;
-      } else if (extension == "info.json") {
+      } else if (extension == 'info.json') {
         String outName = out.path.substring(out.path.lastIndexOf('/') + 1);
         uri = out.resolve('$outName.$extension');
+      } else if (extension == 'data') {
+        if (serializationTarget == null) {
+          onFailure('Serialization target unspecified.');
+        }
+        uri = serializationTarget;
       } else {
         onFailure('Unknown extension: $extension');
       }