sdk files reorganization to make dart2js a proper package

tools/testing/dart/compiler_configuration.dart

 // Copyright (c) 2014, 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.
 
 library compiler_configuration;
 
 import 'dart:io' show
     Platform;
 
 import 'runtime_configuration.dart' show
@@ skipping 261 matching lines @@
       RuntimeConfiguration runtimeConfiguration,
       String buildDir,
       TestInformation info,
       List<String> vmOptions,
       List<String> sharedOptions,
       List<String> originalArguments,
       CommandArtifact artifact) {
     Uri sdk = useSdk ?
         nativeDirectoryToUri(buildDir).resolve('dart-sdk/') :
         nativeDirectoryToUri(TestUtils.dartDir.toNativePath()).resolve('sdk/');
-    Uri preambleDir = sdk.resolve('lib/_internal/compiler/js_lib/preambles/');
+    Uri preambleDir = sdk.resolve(
+        'lib/_internal/js_runtime/lib/preambles/');
     return runtimeConfiguration.dart2jsPreambles(preambleDir)
         ..add(artifact.filename);
   }
 }
 
 /// Common configuration for analyzer-based tools, such as, dartanalyzer.
 class AnalyzerCompilerConfiguration extends CompilerConfiguration {
   final String moniker;
 
   AnalyzerCompilerConfiguration(
@@ skipping 65 matching lines @@
       // shipped SDK, that is the script is not installed in
       // "$buildDir/dart-sdk/bin/"
       return '$prefix/dartanalyzer_developer$suffix';
     }
     if (useSdk) {
       prefix = '$buildDir/dart-sdk/bin';
     }
     return '$prefix/dartanalyzer$suffix';
   }
 }