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diff --git a/WebKit/android/WebCoreSupport/V8Counters.h b/WebKit/android/WebCoreSupport/V8Counters.h
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+++ b/WebKit/android/WebCoreSupport/V8Counters.h
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+/*
+ * Copyright 2010, The Android Open Source Project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
+ * 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 V8Counters_h
+#define V8Counters_h
+
+#if USE(V8)
+
+#ifdef ANDROID_INSTRUMENT
+
+#include <PlatformString.h>
+#include <v8.h>
+
+namespace WebCore {
+
+class V8Counters {
+public:
+    // Counter callbacks, see v8.h
+    static int* counterForName(const char* name);
+
+    static void* createHistogram(const char* name,
+                                 int min,
+                                 int max,
+                                 size_t buckets);
+
+    static void addHistogramSample(void* histogram, int sample);
+
+    static void initCounters();
+    static void dumpCounters();
+private:
+    class Counter {
+    public:
+        Counter(bool isHistogram);
+
+        int count() { return m_count; }
+        int sampleTotal() { return m_sampleTotal; }
+        bool isHistogram() { return m_isHistogram; }
+        void addSample(int32_t sample);
+
+        operator int*() { return &m_count; }
+    private:
+        int m_count;
+        int m_sampleTotal;
+        bool m_isHistogram;
+    };
+
+    static HashMap<String, Counter*> m_counters;
+};
+
+}
+
+#endif // ANDROID_INSTRUMENT
+#endif // USE(V8)
+#endif // V8Counters_h