Revert "Build sky_engine Dart SDK summary bundle on FlutterEngine.download()." (#5455)

packages/flutter_tools/lib/src/cache.dart

diff --git a/packages/flutter_tools/lib/src/cache.dart b/packages/flutter_tools/lib/src/cache.dart
index 5c1338f..3d9ac3b 100644
--- a/packages/flutter_tools/lib/src/cache.dart
+++ b/packages/flutter_tools/lib/src/cache.dart
@@ -5,8 +5,6 @@
 import 'dart:async';
 import 'dart:io';
 
-import 'package:flutter_tools/src/dart/pub.dart';
-import 'package:flutter_tools/src/dart/summary.dart';
 import 'package:path/path.dart' as path;
 
 import 'base/context.dart';
@@ -236,17 +234,13 @@
 }
 
 class FlutterEngine {
-
   FlutterEngine(this.cache);
 
   static const String kName = 'engine';
-  static const String kSkyEngine = 'sky_engine';
-  static const String kSkyServices = 'sky_services';
-  static const String kSdkBundle = 'sdk.ds';
 
   final Cache cache;
 
-  List<String> _getPackageDirs() => const <String>[kSkyEngine, kSkyServices];
+  List<String> _getPackageDirs() => <String>['sky_engine', 'sky_services'];
 
   List<String> _getEngineDirs() {
     List<String> dirs = <String>[
@@ -301,9 +295,6 @@
         return false;
     }
 
-    if (!new File(path.join(pkgDir.path, kSkyEngine, kSdkBundle)).existsSync())
-      return false;
-
     Directory engineDir = cache.getArtifactDirectory(kName);
     for (String dirName in _getEngineDirs()) {
       Directory dir = new Directory(path.join(engineDir.path, dirName));
@@ -328,24 +319,12 @@
 
     Directory pkgDir = cache.getCacheDir('pkg');
     for (String pkgName in _getPackageDirs()) {
-      String pkgPath = path.join(pkgDir.path, pkgName);
-      Directory dir = new Directory(pkgPath);
+      Directory dir = new Directory(path.join(pkgDir.path, pkgName));
       if (!dir.existsSync() || allDirty) {
         await _downloadItem('Downloading package $pkgName...', url + pkgName + '.zip', pkgDir);
-        await pubGet(directory: pkgPath);
       }
     }
 
-    Status summaryStatus = logger.startProgress('Building Dart SDK summary...');
-    try {
-      String skyEnginePath = path.join(pkgDir.path, kSkyEngine);
-      String skyServicesPath = path.join(pkgDir.path, kSkyServices);
-      if (!new File(path.join(skyEnginePath, kSdkBundle)).existsSync())
-        buildSkyEngineSdkSummary(skyEnginePath, skyServicesPath, kSdkBundle);
-    } finally {
-      summaryStatus.stop(showElapsedTime: true);
-    }
-
     Directory engineDir = cache.getArtifactDirectory(kName);
     for (String dirName in _getEngineDirs()) {
       Directory dir = new Directory(path.join(engineDir.path, dirName));

packages/flutter_tools/lib/src/dart/summary.dart

diff --git a/packages/flutter_tools/lib/src/dart/summary.dart b/packages/flutter_tools/lib/src/dart/summary.dart
deleted file mode 100644
index 376d409..0000000
--- a/packages/flutter_tools/lib/src/dart/summary.dart
+++ /dev/null
@@ -1,61 +0,0 @@
-import 'dart:io' as io;
-
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/file_system/physical_file_system.dart';
-import 'package:analyzer/source/sdk_ext.dart';
-import 'package:analyzer/src/context/builder.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/dart/sdk/sdk.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/generated/engine.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/generated/source.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/summary/summary_file_builder.dart'; // ignore: implementation_imports
-import 'package:package_config/packages.dart';
-import 'package:path/path.dart' as pathos;
-
-/// Given the [skyEnginePath] and [skyServicesPath], locate corresponding
-/// `_embedder.yaml` and `_sdkext`, compose the full embedded Dart SDK, and
-/// build the [outBundleName] file with its linked summary.
-void buildSkyEngineSdkSummary(
-    String skyEnginePath, String skyServicesPath, String outBundleName) {
-  ResourceProvider resourceProvider = PhysicalResourceProvider.INSTANCE;
-
-  ContextBuilder builder = new ContextBuilder(resourceProvider, null, null);
-  Packages packages = builder.createPackageMap(skyServicesPath);
-  Map<String, List<Folder>> packageMap = builder.convertPackagesToMap(packages);
-  packageMap['sky_engine'] = <Folder>[
-    resourceProvider.getFolder(pathos.join(skyEnginePath, 'lib'))
-  ];
-
-  //
-  // Read the `_embedder.yaml` file.
-  //
-  EmbedderYamlLocator yamlLocator = new EmbedderYamlLocator(packageMap);
-  assert(yamlLocator.embedderYamls.length == 1);
-
-  //
-  // Read the `_sdkext` file.
-  //
-  SdkExtUriResolver extResolver = new SdkExtUriResolver(packageMap);
-  assert(extResolver.urlMappings.length == 1);
-
-  //
-  // Create the EmbedderSdk instance.
-  //
-  EmbedderSdk sdk =
-      new EmbedderSdk(resourceProvider, yamlLocator.embedderYamls);
-  sdk.addExtensions(extResolver.urlMappings);
-  sdk.analysisOptions = new AnalysisOptionsImpl()..strongMode = true;
-
-  //
-  // Gather sources.
-  //
-  List<Source> sources = sdk.uris.map(sdk.mapDartUri).toList();
-
-  //
-  // Build.
-  //
-  SummaryBuildConfig config = new SummaryBuildConfig(strongMode: true);
-  BuilderOutput output =
-      new SummaryBuilder(sources, sdk.context, config).build();
-  String outputPath = pathos.join(skyEnginePath, outBundleName);
-  new io.File(outputPath).writeAsBytesSync(output.sum);
-}