GN: Build the SDK with app snapshots instead of script snapshots.

utils/compiler/create_snapshot_entry.dart

Index: utils/compiler/create_snapshot_entry.dart
diff --git a/utils/compiler/create_snapshot.dart b/utils/compiler/create_snapshot_entry.dart
similarity index 84%
copy from utils/compiler/create_snapshot.dart
copy to utils/compiler/create_snapshot_entry.dart
index c2ca95e2944703ca4731d4515638d2db3078d502..ea9c5113bab7f12e5d6f320f5939b0a8fc2ee65b 100644
--- a/utils/compiler/create_snapshot.dart
+++ b/utils/compiler/create_snapshot_entry.dart
@@ -61,21 +61,6 @@ void writeSnapshotFile(var path, var content) {
     writer.close();
 }
 
-Future createSnapshot(var dart_file) {
-  return Process.run(Platform.executable,
-                     ["--packages=../../.packages",
-                      "--snapshot=$dart_file.snapshot",
-                      dart_file])
-      .then((result) {
-        if (result.exitCode != 0) {
-          print("Could not generate snapshot: result code ${result.exitCode}");
-          print(result.stdout);
-          print(result.stderr);
-          throw "Could not generate snapshot";
-        }
-      });
-}
-
 /**
  * Takes the following arguments:
  * --output_dir=val     The full path to the output_dir.
@@ -101,13 +86,10 @@ void main(List<String> arguments) {
   getSnapshotGenerationFile(args, rootPath).then((result) {
     var wrapper = "${args['output_dir']}/utils_wrapper.dart";
     writeSnapshotFile(wrapper, result);
-    createSnapshot(wrapper);
   });
 
   getDart2jsSnapshotGenerationFile(args, rootPath).then((result) {
     var wrapper = "${args['output_dir']}/dart2js.dart";
     writeSnapshotFile(wrapper, result);
-    createSnapshot(wrapper);
   });
-
 }