Make UseCounter take a LocaFrame instead of any Frame

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

Index: third_party/WebKit/Source/core/page/FrameTree.cpp
diff --git a/third_party/WebKit/Source/core/page/FrameTree.cpp b/third_party/WebKit/Source/core/page/FrameTree.cpp
index 945eaa4d7ff63a2c534e9dfa4121f9cd19ba98dc..9480da093754bb8bf1b0bd857573f8a1d615c4a1 100644
--- a/third_party/WebKit/Source/core/page/FrameTree.cpp
+++ b/third_party/WebKit/Source/core/page/FrameTree.cpp
@@ -51,8 +51,14 @@ FrameTree::~FrameTree() {}
 const AtomicString& FrameTree::GetName() const {
   // TODO(andypaicu): remove this once we have gathered the data
   if (experimental_set_nulled_name_) {
-    UseCounter::Count(this_frame_.Get(),
-                      UseCounter::kCrossOriginMainFrameNulledNameAccessed);
+    const LocalFrame* frame =
+        this_frame_->IsLocalFrame()
+            ? ToLocalFrame(this_frame_)
+            : (Top().IsLocalFrame() ? ToLocalFrame(&Top()) : nullptr);
+    if (frame) {
+      UseCounter::Count(frame,
+                        UseCounter::kCrossOriginMainFrameNulledNameAccessed);
+    }
   }
   return name_;
 }