Simplify protocal name and port comparison

Source/platform/weborigin/KnownPorts.cpp

Index: Source/platform/weborigin/KnownPorts.cpp
diff --git a/Source/platform/weborigin/KnownPorts.cpp b/Source/platform/weborigin/KnownPorts.cpp
index 71499a5120c0c30971113663f74560f12173b096..9de00e98ff66120c48cfb9d0f50d434ac32afd9d 100644
--- a/Source/platform/weborigin/KnownPorts.cpp
+++ b/Source/platform/weborigin/KnownPorts.cpp
@@ -30,7 +30,6 @@
 #include "platform/weborigin/KURL.h"
 #include "wtf/HashMap.h"
 #include "wtf/StdLibExtras.h"
-#include "wtf/Threading.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
@@ -40,15 +39,22 @@ bool isDefaultPortForProtocol(unsigned short port, const String& protocol)
     if (protocol.isEmpty())
         return false;
 
-    typedef HashMap<String, unsigned, CaseFoldingHash> DefaultPortsMap;
-    AtomicallyInitializedStaticReference(DefaultPortsMap, defaultPorts, new DefaultPortsMap());
-    if (defaultPorts.isEmpty()) {
-        defaultPorts.set("http", 80);
-        defaultPorts.set("https", 443);
-        defaultPorts.set("ftp", 21);
-        defaultPorts.set("ftps", 990);
+    switch (port) {
+    case 80:
+        return protocol == "http";
+        break;
+    case 443:
+        return protocol == "https";
+        break;
+    case 21:
+        return protocol == "ftp";
+        break;
+    case 990:
+        return protocol == "ftps";
+        break;
+    default:
+        return false;
     }
-    return defaultPorts.get(protocol) == port;
 }
 
 bool portAllowed(const KURL& url)