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diff --git a/Source/WebKit2/UIProcess/Launcher/mac/EnvironmentVariables.h b/Source/WebKit2/UIProcess/Launcher/mac/EnvironmentVariables.h
new file mode 100644
index 000000000..33829398d
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+++ b/Source/WebKit2/UIProcess/Launcher/mac/EnvironmentVariables.h
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+/*
+ * Copyright (C) 2010, 2011 Apple 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.
+ */
+
+#ifndef EnvironmentVariables_h
+#define EnvironmentVariables_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/Vector.h>
+
+namespace WebKit {
+
+class EnvironmentVariables {
+    WTF_MAKE_NONCOPYABLE(EnvironmentVariables);
+
+public:
+    EnvironmentVariables();
+    ~EnvironmentVariables();
+
+    void set(const char* name, const char* value);
+    const char* get(const char* name) const;
+
+    // Will append the value with the given separator if the environment variable already exists.
+    void appendValue(const char* name, const char* value, char separator);
+
+    char** environmentPointer() const { return m_environmentPointer; }
+
+#if !defined(BUILDING_ON_SNOW_LEOPARD)
+    static const char* preexistingProcessServiceNameKey();
+    static const char* preexistingProcessTypeKey();
+#endif
+
+private:
+    const char* valueIfVariableHasName(const char* environmentVariable, const char* name) const;
+    const char* createStringForVariable(const char* name, const char* value);
+    void copyEnvironmentVariables();
+
+    char** m_environmentPointer;
+    Vector<char*> m_environmentVariables;
+
+    // These allocated strings will be freed in the destructor.
+    Vector<char*> m_allocatedStrings;
+};
+
+} // namespace WebKit
+
+#endif // EnvironmentVariables_h