invert Eternal::IsEmpty logic

R=svenpanne@chromium.org
BUG=v8:2870

Review URL: https://codereview.chromium.org/23914004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16517 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -458,7 +458,7 @@ template <class T> class Eternal {
   }
   // Can only be safely called if already set.
   V8_INLINE(Local<T> Get(Isolate* isolate));
-  V8_INLINE(bool IsEmpty()) { return index_ != kInitialValue; }
+  V8_INLINE(bool IsEmpty()) { return index_ == kInitialValue; }
   template<class S>
   V8_INLINE(void Set(Isolate* isolate, Local<S> handle));
 

test/cctest/test-global-handles.cc

@@ -338,9 +338,9 @@ TEST(EternalHandles) {
     eternal_handles->Create(
         isolate, *v8::Utils::OpenHandle(*object), &indices[i]);
     // Create with external api
-    CHECK(!eternals[i].IsEmpty());
-    eternals[i].Set(v8_isolate, object);
     CHECK(eternals[i].IsEmpty());
+    eternals[i].Set(v8_isolate, object);
+    CHECK(!eternals[i].IsEmpty());
   }
 
   isolate->heap()->CollectAllAvailableGarbage();
@@ -370,7 +370,7 @@ TEST(EternalHandles) {
     HandleScope scope(isolate);
     v8::Local<v8::Object> object = v8::Object::New();
     v8::Eternal<v8::Object> eternal(v8_isolate, object);
-    CHECK(eternal.IsEmpty());
+    CHECK(!eternal.IsEmpty());
     CHECK(object == eternal.Get(v8_isolate));
   }