Fix 56 hints in pkg/compiler

pkg/compiler/lib/src/dart2js.dart

 // Copyright (c) 2013, 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 dart2js.cmdline;
 
 import 'dart:async'
     show Future, EventSink;
 import 'dart:convert' show UTF8, LineSplitter;
 import 'dart:io'
@@ skipping 99 matching lines @@
   bool explicitOut = false;
   bool wantHelp = false;
   bool wantVersion = false;
   String outputLanguage = 'JavaScript';
   bool stripArgumentSet = false;
   bool analyzeOnly = false;
   bool analyzeAll = false;
   bool dumpInfo = false;
   bool allowNativeExtensions = false;
   bool trustTypeAnnotations = false;
-  bool trustPrimitives = false;
   bool checkedMode = false;
   // List of provided options that imply that output is expected.
   List<String> optionsImplyCompilation = <String>[];
   bool hasDisallowUnsafeEval = false;
   // TODO(johnniwinther): Measure time for reading files.
   SourceFileProvider inputProvider = new CompilerSourceFileProvider();
   diagnosticHandler = new FormattingDiagnosticHandler(inputProvider);
   Map<String, dynamic> environment = new Map<String, dynamic>();
 
   passThrough(String argument) => options.add(argument);
@@ skipping 80 matching lines @@
     implyCompilation(argument);
     dumpInfo = true;
   }
 
   setTrustTypeAnnotations(String argument) {
     trustTypeAnnotations = true;
     implyCompilation(argument);
   }
 
   setTrustPrimitives(String argument) {
-    trustPrimitives = true;
     implyCompilation(argument);
   }
 
   setCheckedMode(String argument) {
     checkedMode = true;
     passThrough(argument);
   }
 
   addInEnvironment(String argument) {
     int eqIndex = argument.indexOf('=');
@@ skipping 386 matching lines @@
     all categories, use --categories=all.
 
   --deferred-map=<file>
     Generates a json file with a mapping from each deferred import to a list of
     the part.js files that will be loaded.
 
   --dump-info
     Generates an out.info.json file with information about the generated code.
     You can inspect the generated file with the viewer at:
         https://dart-lang.github.io/dump-info-visualizer/
-    This feature is currently not supported in combination with the 
+    This feature is currently not supported in combination with the
     '--output-type=dart' option.
 
   --generate-code-with-compile-time-errors
     Generates output even if the program contains compile-time errors. Use the
     exit code to determine if compilation failed.
 
   --use-cps-ir
     Experimental.  Use the new CPS based backend for code generation.
 '''.trim());
 }
@@ skipping 102 matching lines @@
       } else if (exitCode == 253) {
         print(">>> TEST CRASH");
       } else {
         print(">>> TEST FAIL");
       }
       stderr.writeln(">>> EOF STDERR");
       subscription.resume();
     });
   });
 }