Move all flags to CompilerOptions (first step to stop passing the compiler to

tests/compiler/dart2js/sourcemaps/sourcemap_helper.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.
 
 library sourcemap.helper;
 
 import 'dart:async';
 import 'dart:io';
 import 'package:compiler/compiler_new.dart';
 import 'package:compiler/src/apiimpl.dart' as api;
@@ skipping 254 matching lines @@
     if (add) {
       nodes.add(node);
     }
     node.visitChildren(this);
     if (node == soughtNode) {
       add = false;
     }
   }
 }
 
-const String DISABLE_INLINING = '--disable-inlining';
-
 /// Processor that computes [SourceMapInfo] for the JavaScript compiled for a
 /// given Dart file.
 class SourceMapProcessor {
   /// If `true` the output from the compilation is written to files.
   final bool outputToFile;
 
   /// The [Uri] of the Dart entrypoint.
   Uri inputUri;
 
   /// The name of the JavaScript output file.
@@ skipping 21 matching lines @@
       List<String> options,
       {bool verbose: true,
        bool perElement: true,
        bool forMain: false}) async {
     OutputProvider outputProvider = outputToFile
         ? new CloningOutputProvider(targetUri, sourceMapFileUri)
         : new OutputProvider();
     if (options.contains(Flags.useNewSourceInfo)) {
       if (verbose) print('Using the new source information system.');
     }
+    if (options.contains(Flags.disableInlining)) {
+      if (verbose) print('Inlining disabled');
+    }
     api.CompilerImpl compiler = await compilerFor(
         outputProvider: outputProvider,
         // TODO(johnniwinther): Use [verbose] to avoid showing diagnostics.
         options: ['--out=$targetUri', '--source-map=$sourceMapFileUri']
             ..addAll(options));
-    if (options.contains(DISABLE_INLINING)) {
-      if (verbose) print('Inlining disabled');
-      compiler.disableInlining = true;
-    }
 
     JavaScriptBackend backend = compiler.backend;
     var handler = compiler.handler;
     SourceFileProvider sourceFileProvider = handler.provider;
     sourceFileManager = new ProviderSourceFileManager(
         sourceFileProvider,
         outputProvider);
     RecordingSourceInformationStrategy strategy =
         new RecordingSourceInformationStrategy(backend.sourceInformationStrategy);
     backend.sourceInformationStrategy = strategy;
@@ skipping 255 matching lines @@
       absoluteUri = base.resolveUri(uri);
     } else {
       absoluteUri = base.resolve(uri);
     }
     return sourceFiles.putIfAbsent(absoluteUri, () {
       String text = new File.fromUri(absoluteUri).readAsStringSync();
       return new StringSourceFile.fromUri(absoluteUri, text);
     });
   }
 }