Revert of Streamline frame detach

Source/core/frame/FrameHost.cpp

Index: Source/core/frame/FrameHost.cpp
diff --git a/Source/core/frame/FrameHost.cpp b/Source/core/frame/FrameHost.cpp
index 353f6407206461795b7af19ab8a47eba020926ef..8e5541d66473281e0c132871f36886729ad4a9b4 100644
--- a/Source/core/frame/FrameHost.cpp
+++ b/Source/core/frame/FrameHost.cpp
@@ -47,7 +47,6 @@
     : m_page(&page)
     , m_pinchViewport(adoptPtr(new PinchViewport(*this)))
     , m_eventHandlerRegistry(adoptPtrWillBeNoop(new EventHandlerRegistry(*this)))
-    , m_frameCount(0)
 {
 }
 
@@ -92,25 +91,4 @@
     visitor->trace(m_eventHandlerRegistry);
 }
 
-#if ENABLE(ASSERT)
-void checkFrameCountConsistency(int expectedFrameCount, Frame* frame)
-{
-    ASSERT(expectedFrameCount >= 0);
-
-    int actualFrameCount = 0;
-    for (; frame; frame = frame->tree().traverseNext())
-        ++actualFrameCount;
-
-    ASSERT(expectedFrameCount == actualFrameCount);
 }
-#endif
-
-int FrameHost::frameCount() const
-{
-#if ENABLE(ASSERT)
-    checkFrameCountConsistency(m_frameCount, m_page->mainFrame());
-#endif
-    return m_frameCount;
-}
-
-}