Remove most superfluous getter arguments from dart2js.

dart/lib/compiler/implementation/ssa/bailout.dart

 // Copyright (c) 2012, 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.
 
 class BailoutInfo {
   int instructionId;
   int bailoutId;
   BailoutInfo(this.instructionId, this.bailoutId);
 }
 
@@ skipping 88 matching lines @@
       instruction = instruction.next;
     }
   }
 
   // Primitive types that are not null are valuable. These include
   // indexable arrays.
   bool typeValuable(HType type) {
     return type.isPrimitive() && !type.isNull();
   }
 
-  bool get hasTypeGuards() => work.guards.length != 0;
+  bool get hasTypeGuards => work.guards.length != 0;
 
   bool typeGuardWouldBeValuable(HInstruction instruction,
                                 HType speculativeType) {
     // If the type itself is not valuable, do not generate a guard for it.
     if (!typeValuable(speculativeType)) return false;
 
     // Do not insert a type guard if the instruction has a type
     // annotation that disagrees with the speculated type.
     Element source = instruction.sourceElement;
     if (source !== null) {
@@ skipping 417 matching lines @@
         hasComplexBailoutTargets = true;
       }
     } else {
       hasComplexBailoutTargets = true;
       blocks.forEach((HBasicBlock block) {
         block.bailoutTargets.add(target);
       });
     }
   }
 }