Add a vmservice_sdk directory in runtime/bin.

tools/patch_sdk.dart

Index: tools/patch_sdk.dart
diff --git a/tools/patch_sdk.dart b/tools/patch_sdk.dart
index bd6654fc0a75f6559a333eac2f82d4e43e240dbb..088efb99d16180edf8553f0b67543d3e3123296c 100644
--- a/tools/patch_sdk.dart
+++ b/tools/patch_sdk.dart
@@ -127,8 +127,14 @@ Future _main(List<String> argv) async {
         packages: packages,
         outlineOutput: outline,
         backendTarget: forVm ? 'vm_fasta' : 'flutter_fasta');
+    var base = path.fromUri(Platform.script);
+    Uri repositoryDir =
+        new Uri.directory(path.dirname(path.dirname(path.absolute(base))));
+    Uri vmserviceSdk = repositoryDir.resolve('runtime/bin/vmservice_sdk/');

[Siggi Cherem (dart-lang), 2017/06/15 17:43:39]

Sorry I didn't notice this earlier, I just realized this now that you rebased
the CL. This Uri here might not work when building in the flutter-engine repo.

I'm not sure that Alex is using this right now, so for now let's only call
`compile` below when `!forFlutter`.

[sivachandra, 2017/06/15 18:34:21]

How is it in patch set 3?

+    // TODO(sigmundch): Specify libraries.json directly instead of "--sdk"
+    // after #29882 is fixed.
     await fasta.compile([
-      "--sdk=$outDirUri",
+      "--sdk=$vmserviceSdk",
       "--platform=$outline",
       "--target=$targetName",
       "--packages=$packages",
@@ -243,16 +249,6 @@ _copyExtraLibraries(String sdkOut, Map<String, String> locations) {
   _writeSync(builtinLibraryOut, readInputFile(builtinLibraryIn));
   locations['_builtin'] = path.join('_builtin', '_builtin.dart');
 
-  for (var file in ['loader.dart', 'server.dart', 'vmservice_io.dart']) {
-    var libraryIn = path.join(dartDir, 'runtime', 'bin', 'vmservice', file);
-    var libraryOut = path.join(sdkOut, 'vmservice_io', file);
-    _writeSync(libraryOut, readInputFile(libraryIn));
-  }
-
-  locations[forVm ? "vmservice_io" : "vmservice_sky"] =
-      path.join('vmservice_io', 'vmservice_io.dart');
-  locations["_vmservice"] = path.join('vmservice', 'vmservice.dart');
-
   if (forFlutter) {
     // Flutter repo has this layout:
     //  engine/src/