Rename build-root to library-root

lib/src/compiler/compiler.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:collection' show HashSet;
 import 'package:args/args.dart' show ArgParser, ArgResults;
 import 'package:args/src/usage_exception.dart' show UsageException;
 import 'package:analyzer/analyzer.dart'
     show
         AnalysisError,
@@ skipping 274 matching lines @@
     ..addFlag('hoist-type-tests',
         help: 'Hoist types used in type tests', defaultsTo: true)
     ..addFlag('unsafe-angular2-whitelist', defaultsTo: false, hide: true);
 }
 
 /// A unit of Dart code that can be built into a single JavaScript module.
 class BuildUnit {
   /// The name of this module.
   final String name;
 
-  /// Build root.  All library names are relative to this path/prefix.
-  final String buildRoot;
+  /// Library root.  All library names are relative to this path/prefix.
+  final String libraryRoot;
 
   /// The list of sources in this module.
   ///
   /// The set of Dart files can be arbitrarily large, but it must contain
   /// complete libraries including all of their parts, as well as all libraries
   /// that are part of a library cycle.
   final List<String> sources;
 
   /// Given an imported library URI, this will determine to what Dart/JS module
   /// it belongs to.
   // TODO(jmesserly): we should replace this with another way of tracking
   // build units.
   final Func1<Source, String> libraryToModule;
 
-  BuildUnit(this.name, this.buildRoot, this.sources, this.libraryToModule);
+  BuildUnit(this.name, this.libraryRoot, this.sources, this.libraryToModule);
 }
 
 /// The output of Dart->JS compilation.
 ///
 /// This contains the file contents of the JS module, as well as a list of
 /// Dart libraries that are contained in this module.
 class JSModuleFile {
   /// The name of this module.
   final String name;
 
@@ skipping 44 matching lines @@
   }
 }
 
 /// (Public for tests) the error code used when a part is missing.
 final missingPartErrorCode = const CompileTimeErrorCode(
     'MISSING_PART', 'The part was not supplied as an input to the compiler.');
 
 /// (Public for tests) the error code used when a part is unused.
 final unusedPartWarningCode = const StaticWarningCode('UNUSED_PART',
     'The part was not used by any libraries being compiled.', null, false);