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

third_party/WebKit/Source/core/editing/EditingBehavior.cpp

Index: third_party/WebKit/Source/core/editing/EditingBehavior.cpp
diff --git a/third_party/WebKit/Source/core/editing/EditingBehavior.cpp b/third_party/WebKit/Source/core/editing/EditingBehavior.cpp
index 49088f02ad4cbd064e609650a27f02138bfc6258..6f21384e344d47853094759340dd7a28b9ad19cd 100644
--- a/third_party/WebKit/Source/core/editing/EditingBehavior.cpp
+++ b/third_party/WebKit/Source/core/editing/EditingBehavior.cpp
@@ -231,14 +231,14 @@ const char* EditingBehavior::interpretKeyEvent(
 
   if (keyEvent->type() == WebInputEvent::RawKeyDown) {
     int mapKey = modifiers << 16 | event.keyCode();
-    const char* name = mapKey ? keyDownCommandsMap->get(mapKey) : nullptr;
+    const char* name = mapKey ? keyDownCommandsMap->at(mapKey) : nullptr;
     if (!name)
       name = lookupCommandNameFromDomKeyKeyDown(event.key(), modifiers);
     return name;
   }
 
   int mapKey = modifiers << 16 | event.charCode();
-  return mapKey ? keyPressCommandsMap->get(mapKey) : 0;
+  return mapKey ? keyPressCommandsMap->at(mapKey) : 0;
 }
 
 bool EditingBehavior::shouldInsertCharacter(const KeyboardEvent& event) const {