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

third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp

Index: third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp b/third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp
index 8cc210616049a0183aa6932d905a13cd461ab35b..06c1633481521b2a147632fb41cb22d16461a40a 100644
--- a/third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.cpp
@@ -54,7 +54,7 @@ void CustomElementReactionStack::popInvokingReactions() {
 void CustomElementReactionStack::invokeReactions(ElementQueue& queue) {
   for (size_t i = 0; i < queue.size(); ++i) {
     Element* element = queue[i];
-    if (CustomElementReactionQueue* reactions = m_map.get(element)) {
+    if (CustomElementReactionQueue* reactions = m_map.at(element)) {
       reactions->invokeReactions(element);
       CHECK(reactions->isEmpty());
       m_map.erase(element);
@@ -75,7 +75,7 @@ void CustomElementReactionStack::enqueue(Member<ElementQueue>& queue,
     queue = new ElementQueue();
   queue->push_back(element);
 
-  CustomElementReactionQueue* reactions = m_map.get(element);
+  CustomElementReactionQueue* reactions = m_map.at(element);
   if (!reactions) {
     reactions = new CustomElementReactionQueue();
     m_map.insert(TraceWrapperMember<Element>(this, element), reactions);
@@ -104,7 +104,7 @@ void CustomElementReactionStack::enqueueToBackupQueue(
 }
 
 void CustomElementReactionStack::clearQueue(Element* element) {
-  if (CustomElementReactionQueue* reactions = m_map.get(element))
+  if (CustomElementReactionQueue* reactions = m_map.at(element))
     reactions->clear();
 }