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

pkg/compiler/lib/src/ssa/invoke_dynamic_specializers.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.
 
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
 import '../elements/elements.dart';
 import '../js_backend/js_backend.dart';
 import '../types/types.dart';
@@ skipping 80 matching lines @@
   }
 }
 
 class IndexAssignSpecializer extends InvokeDynamicSpecializer {
   const IndexAssignSpecializer();
 
   HInstruction tryConvertToBuiltin(HInvokeDynamic instruction,
                                    Compiler compiler) {
     if (instruction.inputs[1].isMutableIndexable(compiler)) {
       if (!instruction.inputs[2].isInteger(compiler)
-          && compiler.enableTypeAssertions) {
+          && compiler.options.enableTypeAssertions) {
         // We want the right checked mode error.
         return null;
       }
       return new HIndexAssign(instruction.inputs[1],
                               instruction.inputs[2],
                               instruction.inputs[3],
                               instruction.selector);
     }
     return null;
   }
 }
 
 class IndexSpecializer extends InvokeDynamicSpecializer {
   const IndexSpecializer();
 
   HInstruction tryConvertToBuiltin(HInvokeDynamic instruction,
                                    Compiler compiler) {
     if (!instruction.inputs[1].isIndexablePrimitive(compiler)) return null;
     if (!instruction.inputs[2].isInteger(compiler)
-        && compiler.enableTypeAssertions) {
+        && compiler.options.enableTypeAssertions) {
       // We want the right checked mode error.
       return null;
     }
     TypeMask receiverType =
         instruction.getDartReceiver(compiler).instructionType;
     TypeMask type = TypeMaskFactory.inferredTypeForSelector(
         instruction.selector, receiverType, compiler);
     return new HIndex(
         instruction.inputs[1], instruction.inputs[2],
         instruction.selector, type);
@@ skipping 640 matching lines @@
     return constantSystem.codeUnitAt;
   }
 
   HInstruction tryConvertToBuiltin(HInvokeDynamic instruction,
                                    Compiler compiler) {
     // TODO(sra): Implement a builtin HCodeUnitAt instruction and the same index
     // bounds checking optimizations as for HIndex.
     return null;
   }
 }