Rename traverseFrames to pierce and traverse shadow dom too.

headless/public/util/dom_tree_extractor.cc

Index: headless/public/util/dom_tree_extractor.cc
diff --git a/headless/public/util/dom_tree_extractor.cc b/headless/public/util/dom_tree_extractor.cc
index 8b43162cc9a89f008cc773627e3d1b98d0069376..6e4154c44e4f56fca2cdac51f79b6a77f747728d 100644
--- a/headless/public/util/dom_tree_extractor.cc
+++ b/headless/public/util/dom_tree_extractor.cc
@@ -26,10 +26,7 @@ void DomTreeExtractor::ExtractDomTree(
   callback_ = std::move(callback);
 
   devtools_client_->GetDOM()->GetDocument(
-      dom::GetDocumentParams::Builder()
-          .SetDepth(-1)
-          .SetTraverseFrames(true)
-          .Build(),
+      dom::GetDocumentParams::Builder().SetDepth(-1).SetPierce(true).Build(),
       base::Bind(&DomTreeExtractor::OnDocumentFetched,
                  weak_factory_.GetWeakPtr()));