Migrate WTF::HashMap::get() to ::at()

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index dbc53e9642bcbc5f9f9b1076b440d06449d88e6a..d0ffaa7c23026c9136ff9444e9a64db9f8c7634f 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -1386,7 +1386,7 @@ void Document::addStyleReattachData(const Node& node,
 }
 
 StyleReattachData Document::getStyleReattachData(const Node& node) const {
-  return m_styleReattachDataMap.get(&node);
+  return m_styleReattachDataMap.at(&node);
 }
 
 /*
@@ -6601,7 +6601,7 @@ DEFINE_TRACE_WRAPPERS(Document) {
   // Cannot trace in Supplementable<Document> as it is part of platform/ and
   // thus cannot refer to ScriptWrappableVisitor.
   visitor->traceWrappers(
-      static_cast<FontFaceSet*>(Supplementable<Document>::m_supplements.get(
+      static_cast<FontFaceSet*>(Supplementable<Document>::m_supplements.at(
           FontFaceSet::supplementName())));
   ContainerNode::traceWrappers(visitor);
 }