DOMWindow::navigator should return navigator w/o frame when detached.

Source/core/frame/LocalDOMWindow.cpp

Index: Source/core/frame/LocalDOMWindow.cpp
diff --git a/Source/core/frame/LocalDOMWindow.cpp b/Source/core/frame/LocalDOMWindow.cpp
index 0ffefbc9f3026c909f369bca438422e598acdad5..8ec7bb0635bd1aa049e8a5ecca329d2b6a3ed049 100644
--- a/Source/core/frame/LocalDOMWindow.cpp
+++ b/Source/core/frame/LocalDOMWindow.cpp
@@ -662,7 +662,8 @@ ApplicationCache* LocalDOMWindow::applicationCache() const
 Navigator* LocalDOMWindow::navigator() const
 {
     if (!m_navigator)
-        m_navigator = Navigator::create(frame());
+        m_navigator = Navigator::create(isCurrentlyDisplayedInFrame() ? frame() : nullptr);

[haraken, 2015/08/24 06:28:21]

Can you add a comment on this?

[yhirano, 2015/08/24 06:52:35]

Done.

+    ASSERT(isCurrentlyDisplayedInFrame() || !m_navigator->frame());
     return m_navigator.get();
 }