Introduce a bazel provider

pkg/compiler/lib/compiler_new.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.
 
 /// New Compiler API. This API is under construction, use only internally or
 /// in unittests.
 
 library compiler_new;
 
 import 'dart:async';
@@ skipping 21 matching lines @@
   /// scanner is more efficient in this case. In either case, the data structure
   /// is expected to hold a zero element at the last position. If this is not
   /// the case, the entire data structure is copied before scanning.
   Future/*<String | List<int>>*/ readFromUri(Uri uri);
 }
 
 /// Interface for producing output from the compiler. That is, JavaScript target
 /// files, source map files, dump info files, etc.
 abstract class CompilerOutput {
   /// Returns an [EventSink] that will serve as compiler output for the given
-  ///  component.
+  /// component.
   ///
-  ///  Components are identified by [name] and [extension]. By convention,
+  /// Components are identified by [name] and [extension]. By convention,
   /// the empty string [:"":] will represent the main script
   /// (corresponding to the script parameter of [compile]) even if the
   /// main script is a library. For libraries that are compiled
   /// separately, the library name is used.
   ///
   /// At least the following extensions can be expected:
   ///
   /// * "js" for JavaScript output.
   /// * "js.map" for source maps.
   /// * "dart" for Dart output.
@@ skipping 63 matching lines @@
   if (compilerOutput == null) {
     throw new ArgumentError("compilerOutput must be non-null");
   }
 
   CompilerImpl compiler = new CompilerImpl(
       compilerInput, compilerOutput, compilerDiagnostics, compilerOptions);
   return compiler.run(compilerOptions.entryPoint).then((bool success) {
     return new CompilationResult(compiler, isSuccess: success);
   });
 }