Revert of Streamline frame detach

Source/core/frame/FrameHost.h

Index: Source/core/frame/FrameHost.h
diff --git a/Source/core/frame/FrameHost.h b/Source/core/frame/FrameHost.h
index efceca02ce53e65a6ac14471e20ac5baf1a29806..e4a7a36fc88aec7fb2b4d2c837570a107c0a0ba5 100644
--- a/Source/core/frame/FrameHost.h
+++ b/Source/core/frame/FrameHost.h
@@ -82,15 +82,6 @@
 
     void trace(Visitor*);
 
-    // Don't allow more than a certain number of frames in a page.
-    // This seems like a reasonable upper bound, and otherwise mutually
-    // recursive frameset pages can quickly bring the program to its knees
-    // with exponential growth in the number of frames.
-    static const int maxNumberOfFrames = 1000;
-    void incrementFrameCount() { ++m_frameCount; }
-    void decrementFrameCount() { ASSERT(m_frameCount); --m_frameCount; }
-    int frameCount() const;
-
 private:
     explicit FrameHost(Page&);
 
@@ -99,7 +90,6 @@
     const OwnPtrWillBeMember<EventHandlerRegistry> m_eventHandlerRegistry;
 
     AtomicString m_overrideEncoding;
-    int m_frameCount;
 };
 
 }