Many type fixes.

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 123 matching lines @@
       //
       // while (true) { <-- (4) update the marker with the environment
       //   use(x);      <-- (3) environment = {x}
       //   bailout;     <-- (2) has the marker when computed
       // }              <-- (1) create a loop marker
       //
       // The bailout instruction first captures the marker, but it
       // will be replaced by the live environment at the loop entry,
       // in this case {x}.
       environment.removeLoopMarker(block);
-      capturedEnvironments.forEach((instruction, env) {
+      capturedEnvironments.forEach((ignoredInstruction, env) {
         if (env.containsLoopMarker(block)) {
           env.removeLoopMarker(block);
           env.addAll(environment);
         }
       });
     }
   }
 
   void visitPhi(HPhi phi) {
     maybeCaptureEnvironment(phi);
@@ skipping 204 matching lines @@
     compiler.internalError('Control flow instructions already dealt with.',
                            instruction: instruction);
   }
 
   visitTypeGuard(HTypeGuard guard) {
     blocks.forEach((HBasicBlock block) {
       block.guards.add(guard);
     });
   }
 }