Remove isolate argument from handle allocation: Part I

runtime/vm/compiler_test.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 "platform/assert.h"
 #include "vm/class_finalizer.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/object.h"
@@ skipping 165 matching lines @@
   // Isolate::Current()->flags().set_checked(true);
   Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
   Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
   RawLibrary* raw_library = Library::RawCast(Api::UnwrapHandle(lib));
   Library& lib_handle = Library::ZoneHandle(raw_library);
   Class& cls = Class::Handle(
       lib_handle.LookupClass(String::Handle(Symbols::New("A"))));
   EXPECT(!cls.IsNull());
 
-  Isolate* isolate = Isolate::Current();
-  const Code& stub = Code::Handle(isolate,
+  Zone* zone = thread->zone();
+  const Code& stub = Code::Handle(zone,
                                   StubCode::GetAllocationStubForClass(cls));
   Class& owner = Class::Handle();
   owner ^= stub.owner();
   owner.DisableAllocationStub();
   result = Dart_Invoke(lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
 
   owner.DisableAllocationStub();
   result = Dart_Invoke(lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
@@ skipping 73 matching lines @@
   EXPECT(val.IsInteger());
   EXPECT_EQ(7, Integer::Cast(val).AsInt64Value());
 
   intptr_t final_class_table_size =
       Isolate::Current()->class_table()->NumCids();
   // Eval should not eat into this non-renewable resource.
   EXPECT_EQ(initial_class_table_size, final_class_table_size);
 }
 
 }  // namespace dart