Rename buildOutline() and separate 'build' and 'writeProgram()'.

pkg/front_end/lib/kernel_generator.dart

Index: pkg/front_end/lib/kernel_generator.dart
diff --git a/pkg/front_end/lib/kernel_generator.dart b/pkg/front_end/lib/kernel_generator.dart
index 3fce2f8ea10cd2337a981ac804207649ca8ba41a..2923532a1891061390fa3f644418a3a2ce3aea43 100644
--- a/pkg/front_end/lib/kernel_generator.dart
+++ b/pkg/front_end/lib/kernel_generator.dart
@@ -62,9 +62,9 @@ Future<Program> kernelForProgram(Uri source, CompilerOptions options) async {
         options.fileSystem, dillTarget, uriTranslator, options.strongMode);
     kernelTarget.read(source);
 
-    await dillTarget.computeOutline();
-    await kernelTarget.computeOutline();
-    Program program = await kernelTarget.writeProgram(null);
+    await dillTarget.buildOutlines();
+    await kernelTarget.buildOutlines();
+    Program program = await kernelTarget.buildProgram();
 
     if (kernelTarget.errors.isNotEmpty) {
       kernelTarget.errors.forEach((e) => report('$e'));