Generate outline without transformations in patched_sdk, use it for unit tests

tools/patch_sdk.dart

 #!/usr/bin/env dart
 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Command line tool to merge the SDK libraries and our patch files.
 /// This is currently designed as an offline tool, but we could automate it.
 
 import 'dart:io';
 import 'dart:isolate' show RawReceivePort;
@@ skipping 86 matching lines @@
   // Enumerate core libraries and apply patches
   for (SdkLibrary library in sdkLibraries) {
     if (forDart2js && library.isVmLibrary) continue;
     if (forVm && library.isDart2JsLibrary) continue;
     _applyPatch(library, sdkLibIn, patchIn, sdkOut);
   }
 
   if (forVm) _copyExtraVmLibraries(sdkOut);
 
   Uri platform = outDirUri.resolve('platform.dill.tmp');
+  Uri outline = outDirUri.resolve('outline.dill');
   Uri packages = Uri.base.resolveUri(new Uri.file(packagesFile));
   if (forVm) {
-    await fasta.compilePlatform(outDirUri, platform, packages: packages);
+    await fasta.compilePlatform(outDirUri, platform,
+        packages: packages, outlineOutput: outline);
   } else {
-    await dart2js.compilePlatform(outDirUri, platform, packages: packages);
+    await dart2js.compilePlatform(outDirUri, platform,
+        packages: packages, outlineOutput: outline);
   }
 
   Uri platformFinalLocation = outDirUri.resolve('platform.dill');
 
   // To properly regenerate the patched_sdk, patched_dart2js_sdk, and
   // platform.dill only when necessary, we track dependencies as follows:
   //  - inputs like the sdk libraries and patch files are covered by the
   //    extraDependencies argument.
   //  - this script and its script dependencies are handled by writeDepsFile
   //    here.
@@ skipping 484 matching lines @@
     if (diff != 0) return diff;
     return end - other.end;
   }
 }
 
 List<SdkLibrary> _getSdkLibraries(String contents) {
   var libraryBuilder = new SdkLibrariesReader_LibraryBuilder(true);
   parseCompilationUnit(contents).accept(libraryBuilder);
   return libraryBuilder.librariesMap.sdkLibraries;
 }