CL for perf tryjob on win

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index 1ec2a765cac93a1a2b36879178dd9ab9dd00a619..1936d77043bc0ed14a0385b0fbf6988c31c5232c 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -1822,6 +1822,12 @@ PassRefPtrWillBeRawPtr<LocalFrame> WebLocalFrameImpl::createChildFrame(const Fra
     }
     webframeChild->frame()->loader().load(newRequest, loadType, childItem.get());
 
+    // Apply the creating worldId to the created child frame.
+    if (v8::Isolate::GetCurrent()->InContext()) {
+        DOMWrapperWorld& world = DOMWrapperWorld::current(v8::Isolate::GetCurrent());
+        ScriptState::forMainWorld(webframeChild->frame())->world().setParentWorldId(world.originWorldId());
+    }
+
     // Note a synchronous navigation (about:blank) would have already processed
     // onload, so it is possible for the child frame to have already been
     // detached by script in the page.