Move sticky_error_ from isolate 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/cha.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/hash_table.h"
@@ skipping 27 matching lines @@
 
 RawError* Precompiler::CompileAll(
     Dart_QualifiedFunctionName embedder_entry_points[],
     bool reset_fields) {
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     Precompiler precompiler(Thread::Current(), reset_fields);
     precompiler.DoCompileAll(embedder_entry_points);
     return Error::null();
   } else {
-    Isolate* isolate = Isolate::Current();
-    const Error& error = Error::Handle(isolate->object_store()->sticky_error());
-    isolate->object_store()->clear_sticky_error();
+    Thread* thread = Thread::Current();
+    const Error& error = Error::Handle(thread->sticky_error());
+    thread->clear_sticky_error();
     return error.raw();
   }
 }
 
 
 Precompiler::Precompiler(Thread* thread, bool reset_fields) :
     thread_(thread),
     zone_(NULL),
     isolate_(thread->isolate()),
     reset_fields_(reset_fields),
@@ skipping 1231 matching lines @@
       cls = it.GetNextClass();
       if (cls.IsDynamicClass()) {
         continue;  // class 'dynamic' is in the read-only VM isolate.
       }
       cls.set_is_allocated(false);
     }
   }
 }
 
 }  // namespace dart