Added UseCounter for clearing browsing context name on cross-origin name

third_party/WebKit/Source/core/page/FrameTree.h

Index: third_party/WebKit/Source/core/page/FrameTree.h
diff --git a/third_party/WebKit/Source/core/page/FrameTree.h b/third_party/WebKit/Source/core/page/FrameTree.h
index e04ddc85660b46014aec797dc1adbc6b5dfa6cd8..cd17bb31db0fab3975277dc22c1e240faa826676 100644
--- a/third_party/WebKit/Source/core/page/FrameTree.h
+++ b/third_party/WebKit/Source/core/page/FrameTree.h
@@ -36,9 +36,12 @@ class CORE_EXPORT FrameTree final {
   explicit FrameTree(Frame* thisFrame);
   ~FrameTree();
 
-  const AtomicString& name() const { return m_name; }
+  const AtomicString& name() const;
   void setName(const AtomicString&);
 
+  // TODO(andypaicu): remove this once we have gathered the data
+  void experimentalSetNulledName();
+
   Frame* parent() const;
   Frame* top() const;
   Frame* nextSibling() const;
@@ -63,6 +66,9 @@ class CORE_EXPORT FrameTree final {
   AtomicString m_name;  // The actual frame name (may be empty).
 
   mutable unsigned m_scopedChildCount;
+
+  // TODO(andypaicu): remove this once we have gathered the data
+  bool m_experimentalSetNulledName;
 };
 
 }  // namespace blink