Make saving and restoring of the context around closure calls explicit.

vm/il_printer.cc

 // 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.
 
 #include "vm/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 
 namespace dart {
@@ skipping 82 matching lines @@
   }
   if (instantiator_type_arguments() != NULL) {
     f->Print(" (instantiator:");
     instantiator_type_arguments()->PrintTo(f);
     f->Print(")");
   }
 }
 
 
 void ClosureCallComp::PrintOperandsTo(BufferFormatter* f) const {
-  context()->PrintTo(f);
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
-    f->Print(", ");
+    if (i == 0) f->Print(", ");
     ArgumentAt(i)->PrintTo(f);
   }
 }
 
 
 void InstanceCallComp::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", function_name().ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); ++i) {
     f->Print(", ");
     ArgumentAt(i)->PrintTo(f);
@@ skipping 218 matching lines @@
   f->Print("    %s ", DebugName());
   f->Print("if ");
   value()->PrintTo(f);
   f->Print(" goto (%d, %d)",
             true_successor()->block_id(),
             false_successor()->block_id());
 }
 
 
 }  // namespace dart