CL for perf tryjob on win

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

Index: third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h b/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h
index aeadf0611815e4309a02ae1ff14b3d0e32f98888..f92d0291f6a73447c1fd516b39fbc7955807a187 100644
--- a/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h
+++ b/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.h
@@ -60,6 +60,27 @@ template<typename T> class DOMObjectHolder;
 // This class represent a collection of DOM wrappers for a specific world.
 class CORE_EXPORT DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
 public:
+    class ParentWorldIdPusher {
+    public:
+        explicit ParentWorldIdPusher(DOMWrapperWorld& domWrapperWorld, int newParentWorldId)
+            : m_oldParentWorldId(domWrapperWorld.originWorldId())
+            , m_domWrapperWorld(domWrapperWorld)
+        {
+            // "Push" the parent world id.
+            m_domWrapperWorld.setParentWorldId(newParentWorldId);
+        }
+
+        ~ParentWorldIdPusher()
+        {
+            // "Pop" the parent world id to avoid tainting the entire document.
+            m_domWrapperWorld.setParentWorldId(m_oldParentWorldId);
+        }
+
+    private:
+        int m_oldParentWorldId;
+        DOMWrapperWorld& m_domWrapperWorld;
+    };
+
     static PassRefPtr<DOMWrapperWorld> create(v8::Isolate*, int worldId = -1, int extensionGroup = -1);
 
     static const int mainWorldExtensionGroup = 0;
@@ -117,7 +138,19 @@ public:
     bool isIsolatedWorld() const { return MainWorldId < m_worldId  && m_worldId < IsolatedWorldIdLimit; }
 
     int worldId() const { return m_worldId; }
+    int originWorldId() const { return isIsolatedWorld() ? m_worldId : m_parentWorldId; }
     int extensionGroup() const { return m_extensionGroup; }
+    bool isOfIsolatedWorldOrigin() const
+    {
+        int worldId = originWorldId();
+        return MainWorldId < worldId && worldId < IsolatedWorldIdLimit;
+    };
+    void setParentWorldId(int worldId)
+    {
+        m_parentWorldId = worldId;
+        ASSERT(isMainWorld() || isIsolatedWorld());
+    };
+
     DOMDataStore& domDataStore() const { return *m_domDataStore; }
 
     static void setWorldOfInitializingWindow(DOMWrapperWorld* world)
@@ -142,6 +175,7 @@ private:
 
     const int m_worldId;
     const int m_extensionGroup;
+    int m_parentWorldId;
     OwnPtr<DOMDataStore> m_domDataStore;
     HashSet<OwnPtr<DOMObjectHolderBase>> m_domObjectHolders;
 };