remove uses of static oddball accessors using GetCurrent in advance of removal from api

test/cctest/test-object-observe.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 376 matching lines @@
   CompileRun(
       "var records;"
       "function observer(r) { records = r; };"
       "Object.observe(obj, observer);"
       "obj.foo = 41;"  // triggers a notification
       "proto.foo = 42;");  // does not trigger a notification
   const RecordExpectation expected_records[] = {
     { obj, "updated", "foo", Number::New(75) }
   };
   EXPECT_RECORDS(CompileRun("records"), expected_records);
-  obj->SetPrototype(Null());
+  obj->SetPrototype(Null(isolate.GetIsolate()));
   CompileRun("obj.foo = 43");
   const RecordExpectation expected_records2[] = {
     { obj, "new", "foo", Handle<Value>() }
   };
   EXPECT_RECORDS(CompileRun("records"), expected_records2);
   obj->SetPrototype(proto);
   CompileRun(
       "Object.observe(proto, observer);"
       "proto.bar = 1;"
       "Object.unobserve(obj, observer);"
@@ skipping 308 matching lines @@
     instance->Set(String::New("foo"), String::New("bar"));
     CompileRun("");  // trigger delivery
     const RecordExpectation expected_records2[] = {
       { instance, "new", "5", Handle<Value>() },
       { instance, "new", "foo", Handle<Value>() }
     };
     EXPECT_RECORDS(CompileRun("records2"), expected_records2);
   }
   CHECK(CompileRun("records")->IsNull());
 }