Use a HashCountedSet to count identifiers in InspectorConsoleAgent

Source/core/inspector/InspectorConsoleAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 225 matching lines @@
 {
     RefPtr<ScriptCallStack> callStack(createScriptCallStackForConsole());
     const ScriptCallFrame& lastCaller = callStack->at(0);
     // Follow Firebug's behavior of counting with null and undefined title in
     // the same bucket as no argument
     String title;
     arguments->getFirstArgumentAsString(title);
     String identifier = title.isEmpty() ? String(lastCaller.sourceURL() + ':' + String::number(lastCaller.lineNumber()))
                                         : String(title + '@');
 
-    HashMap<String, unsigned>::iterator it = m_counts.find(identifier);
-    int count;
-    if (it == m_counts.end())
-        count = 1;
-    else {
-        count = it->value + 1;
-        m_counts.remove(it);
-    }
-
-    m_counts.add(identifier, count);
-
-    String message = title + ": " + String::number(count);
+    HashCountedSet<String>::AddResult result = m_counts.add(identifier);
+    String message = title + ": " + String::number(result.iterator->value);
     addMessageToConsole(ConsoleAPIMessageSource, LogMessageType, DebugMessageLevel, message, callStack);
 }
 
 void InspectorConsoleAgent::frameWindowDiscarded(DOMWindow* window)
 {
     size_t messageCount = m_consoleMessages.size();
     for (size_t i = 0; i < messageCount; ++i)
         m_consoleMessages[i]->windowCleared(window);
     m_injectedScriptManager->discardInjectedScriptsFor(window);
 }
@@ skipping 80 matching lines @@
     int m_heapObjectId;
 };
 
 void InspectorConsoleAgent::addInspectedHeapObject(ErrorString*, int inspectedHeapObjectId)
 {
     m_injectedScriptManager->injectedScriptHost()->addInspectedObject(adoptPtr(new InspectableHeapObject(inspectedHeapObjectId)));
 }
 
 } // namespace WebCore