Add tests for trace wrappers

third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
index 3b73e129ad53aef1408d9f698b56a0cb69324e48..10f3f62f46f8ad2f7244aeb6e90b83a4a1cea7ac 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
@@ -53,6 +53,12 @@ public:
         return !m_object || heapObjectHeader()->isWrapperHeaderMarked();
     }
 
+    /**
+     * Returns raw object pointer. Beware it doesn't necessarily point to the
+     * beginning of the object.
+     */
+    const void* object() { return m_object; }

[haraken, 2016/09/02 10:53:14]

I'd rename this to rawObjectPointer or something.

[Marcel Hlopko, 2016/09/02 12:12:40]

Done.

+
 private:
     inline bool shouldBeInvalidated()
     {
@@ -144,6 +150,10 @@ public:
      */
     void markWrappersInAllWorlds(const ScriptWrappable*) const override;
     void markWrappersInAllWorlds(const void*) const override {}
+
+    WTF::Deque<WrapperMarkingData>* getMarkingDeque() { return &m_markingDeque; }
+    WTF::Deque<WrapperMarkingData>* getVerifierDeque() { return &m_verifierDeque; }
+    WTF::Vector<HeapObjectHeader*>* getHeadersToUnmark() { return &m_headersToUnmark; }
 private:
     /**
      * Is wrapper tracing currently in progress? True if TracePrologue has been