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diff --git a/Source/JavaScriptCore/inspector/agents/InspectorConsoleAgent.h b/Source/JavaScriptCore/inspector/agents/InspectorConsoleAgent.h
new file mode 100644
index 000000000..175cec9da
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+++ b/Source/JavaScriptCore/inspector/agents/InspectorConsoleAgent.h
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+/*
+* Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
+* 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
+*     documentation and/or other materials provided with the distribution.
+*
+* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#pragma once
+
+#include "InspectorBackendDispatchers.h"
+#include "InspectorFrontendDispatchers.h"
+#include "inspector/InspectorAgentBase.h"
+#include "runtime/ConsoleTypes.h"
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/Vector.h>
+#include <wtf/text/StringHash.h>
+
+namespace JSC {
+class ExecState;
+}
+
+namespace Inspector {
+
+class ConsoleMessage;
+class InjectedScriptManager;
+class InspectorHeapAgent;
+class ScriptArguments;
+class ScriptCallStack;
+typedef String ErrorString;
+
+class JS_EXPORT_PRIVATE InspectorConsoleAgent : public InspectorAgentBase, public ConsoleBackendDispatcherHandler {
+    WTF_MAKE_NONCOPYABLE(InspectorConsoleAgent);
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    InspectorConsoleAgent(AgentContext&, InspectorHeapAgent*);
+    virtual ~InspectorConsoleAgent();
+
+    void didCreateFrontendAndBackend(FrontendRouter*, BackendDispatcher*) override;
+    void willDestroyFrontendAndBackend(DisconnectReason) override;
+    void discardValues() override;
+
+    void enable(ErrorString&) override;
+    void disable(ErrorString&) override;
+    void clearMessages(ErrorString&) override;
+    void setMonitoringXHREnabled(ErrorString&, bool enabled) override = 0;
+    void addInspectedNode(ErrorString&, int nodeId) override = 0;
+
+    bool enabled() const { return m_enabled; }
+    void reset();
+
+    void addMessageToConsole(std::unique_ptr<ConsoleMessage>);
+
+    void startTiming(const String& title);
+    void stopTiming(const String& title, Ref<ScriptCallStack>&&);
+    void takeHeapSnapshot(const String& title);
+    void count(JSC::ExecState*, Ref<ScriptArguments>&&);
+
+protected:
+    void addConsoleMessage(std::unique_ptr<ConsoleMessage>);
+
+    InjectedScriptManager& m_injectedScriptManager;
+    std::unique_ptr<ConsoleFrontendDispatcher> m_frontendDispatcher;
+    RefPtr<ConsoleBackendDispatcher> m_backendDispatcher;
+    InspectorHeapAgent* m_heapAgent;
+
+    ConsoleMessage* m_previousMessage { nullptr };
+    Vector<std::unique_ptr<ConsoleMessage>> m_consoleMessages;
+    int m_expiredConsoleMessageCount { 0 };
+    HashMap<String, unsigned> m_counts;
+    HashMap<String, double> m_times;
+    bool m_enabled { false };
+};
+
+} // namespace Inspector