[oilpan] Remove GC_INFO_{DEFINE,DECLARE} macros

Source/heap/tests/HeapTest.cpp

Index: Source/heap/tests/HeapTest.cpp
diff --git a/Source/heap/tests/HeapTest.cpp b/Source/heap/tests/HeapTest.cpp
index b357bb9b32efbc62aa9bf5f094953eaba20070a4..0cfa793a6b9d4d7692c4ef525fa7ab887fbb3647 100644
--- a/Source/heap/tests/HeapTest.cpp
+++ b/Source/heap/tests/HeapTest.cpp
@@ -2493,7 +2493,7 @@ class CollectionsEmbeddedClass {
 
     template<typename T> friend struct FinalizerTrait;
 
-    class ObjectReferringToCollections : HeapAllocated<ObjectReferringToCollections> {
+    class ObjectReferringToCollections : public HeapAllocated<ObjectReferringToCollections> {
         DECLARE_GC_INFO
     public:
         void trace(Visitor* visitor)
@@ -2518,7 +2518,7 @@ class CollectionsEmbeddedClass {
         }
     };
 
-    class ObjectContainingCollections : HeapAllocated<ObjectContainingCollections> {
+    class ObjectContainingCollections : public HeapAllocated<ObjectContainingCollections> {
         DECLARE_GC_INFO
     public:
         IntSet m_set;