Migrate LongJumpScope to Thread.

runtime/vm/precompiler.cc

 // Copyright (c) 2015, 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/precompiler.h"
 
 #include "vm/compiler.h"
 #include "vm/isolate.h"
 #include "vm/log.h"
 #include "vm/longjump.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 
 #define I (isolate())
 #define Z (zone())
 
 
 DEFINE_FLAG(bool, trace_precompiler, false, "Trace precompiler.");
 
 
 static void Jump(const Error& error) {
-  Isolate::Current()->long_jump_base()->Jump(1, error);
+  Thread::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 RawError* Precompiler::CompileAll() {
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     Precompiler precompiler(Thread::Current());
     precompiler.DoCompileAll();
     return Error::null();
   } else {
@@ skipping 593 matching lines @@
         for (intptr_t j = 0; j < closures.Length(); j++) {
           function ^= closures.At(j);
           ASSERT(function.HasCode());
         }
       }
     }
   }
 }
 
 }  // namespace dart