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

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

Index: third_party/WebKit/Source/core/dom/Node.cpp
diff --git a/third_party/WebKit/Source/core/dom/Node.cpp b/third_party/WebKit/Source/core/dom/Node.cpp
index 13dadd2792807956ca7d7670bab8918b3c581f79..145594cda4829b5c5ce66f83895e90413aa575e1 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -1912,12 +1912,12 @@ static EventTargetDataMap& eventTargetDataMap() {
 }
 
 EventTargetData* Node::eventTargetData() {
-  return hasEventTargetData() ? eventTargetDataMap().get(this) : nullptr;
+  return hasEventTargetData() ? eventTargetDataMap().at(this) : nullptr;
 }
 
 EventTargetData& Node::ensureEventTargetData() {
   if (hasEventTargetData())
-    return *eventTargetDataMap().get(this);
+    return *eventTargetDataMap().at(this);
   DCHECK(!eventTargetDataMap().contains(this));
   setHasEventTargetData(true);
   EventTargetData* data = new EventTargetData;