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diff --git a/widget/gonk/libui/KeyLayoutMap.h b/widget/gonk/libui/KeyLayoutMap.h
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+++ b/widget/gonk/libui/KeyLayoutMap.h
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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _ANDROIDFW_KEY_LAYOUT_MAP_H
+#define _ANDROIDFW_KEY_LAYOUT_MAP_H
+
+#include <stdint.h>
+#include <utils/Errors.h>
+#include <utils/KeyedVector.h>
+#include "Tokenizer.h"
+#include <utils/RefBase.h>
+
+namespace android {
+
+struct AxisInfo {
+    enum Mode {
+        // Axis value is reported directly.
+        MODE_NORMAL = 0,
+        // Axis value should be inverted before reporting.
+        MODE_INVERT = 1,
+        // Axis value should be split into two axes
+        MODE_SPLIT = 2,
+    };
+
+    // Axis mode.
+    Mode mode;
+
+    // Axis id.
+    // When split, this is the axis used for values smaller than the split position.
+    int32_t axis;
+
+    // When split, this is the axis used for values after higher than the split position.
+    int32_t highAxis;
+
+    // The split value, or 0 if not split.
+    int32_t splitValue;
+
+    // The flat value, or -1 if none.
+    int32_t flatOverride;
+
+    AxisInfo() : mode(MODE_NORMAL), axis(-1), highAxis(-1), splitValue(0), flatOverride(-1) {
+    }
+};
+
+/**
+ * Describes a mapping from keyboard scan codes and joystick axes to Android key codes and axes.
+ *
+ * This object is immutable after it has been loaded.
+ */
+class KeyLayoutMap : public RefBase {
+public:
+    static status_t load(const String8& filename, sp<KeyLayoutMap>* outMap);
+
+    status_t mapKey(int32_t scanCode, int32_t usageCode,
+            int32_t* outKeyCode, uint32_t* outFlags) const;
+    status_t findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const;
+    status_t findScanCodeForLed(int32_t ledCode, int32_t* outScanCode) const;
+    status_t findUsageCodeForLed(int32_t ledCode, int32_t* outUsageCode) const;
+
+    status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
+
+protected:
+    virtual ~KeyLayoutMap();
+
+private:
+    struct Key {
+        int32_t keyCode;
+        uint32_t flags;
+    };
+
+    struct Led {
+        int32_t ledCode;
+    };
+
+
+    KeyedVector<int32_t, Key> mKeysByScanCode;
+    KeyedVector<int32_t, Key> mKeysByUsageCode;
+    KeyedVector<int32_t, AxisInfo> mAxes;
+    KeyedVector<int32_t, Led> mLedsByScanCode;
+    KeyedVector<int32_t, Led> mLedsByUsageCode;
+
+    KeyLayoutMap();
+
+    const Key* getKey(int32_t scanCode, int32_t usageCode) const;
+
+    class Parser {
+        KeyLayoutMap* mMap;
+        Tokenizer* mTokenizer;
+
+    public:
+        Parser(KeyLayoutMap* map, Tokenizer* tokenizer);
+        ~Parser();
+        status_t parse();
+
+    private:
+        status_t parseKey();
+        status_t parseAxis();
+        status_t parseLed();
+    };
+};
+
+} // namespace android
+
+#endif // _ANDROIDFW_KEY_LAYOUT_MAP_H