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diff --git a/widget/gonk/nativewindow/GonkBufferQueueLL/GonkBufferItem.h b/widget/gonk/nativewindow/GonkBufferQueueLL/GonkBufferItem.h
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+++ b/widget/gonk/nativewindow/GonkBufferQueueLL/GonkBufferItem.h
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+/*
+ * Copyright 2014 The Android Open Source Project
+ * Copyright (C) 2014 Mozilla Foundation
+ *
+ * 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 NATIVEWINDOW_GONKBUFFERITEM_LL_H
+#define NATIVEWINDOW_GONKBUFFERITEM_LL_H
+
+#include "IGonkGraphicBufferConsumerLL.h"
+
+#include <ui/Rect.h>
+
+#include <utils/Flattenable.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+class Fence;
+class GraphicBuffer;
+
+class GonkBufferItem : public Flattenable<GonkBufferItem> {
+    friend class Flattenable<GonkBufferItem>;
+    size_t getPodSize() const;
+    size_t getFlattenedSize() const;
+    size_t getFdCount() const;
+    status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const;
+    status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count);
+
+    public:
+    // The default value of mBuf, used to indicate this doesn't correspond to a slot.
+    enum { INVALID_BUFFER_SLOT = -1 };
+    GonkBufferItem();
+    operator IGonkGraphicBufferConsumer::BufferItem() const;
+
+    static const char* scalingModeName(uint32_t scalingMode);
+
+    // mGraphicBuffer points to the buffer allocated for this slot, or is NULL
+    // if the buffer in this slot has been acquired in the past (see
+    // BufferSlot.mAcquireCalled).
+    sp<GraphicBuffer> mGraphicBuffer;
+
+    // mFence is a fence that will signal when the buffer is idle.
+    sp<Fence> mFence;
+
+    // mCrop is the current crop rectangle for this buffer slot.
+    Rect mCrop;
+
+    // mTransform is the current transform flags for this buffer slot.
+    // refer to NATIVE_WINDOW_TRANSFORM_* in <window.h>
+    uint32_t mTransform;
+
+    // mScalingMode is the current scaling mode for this buffer slot.
+    // refer to NATIVE_WINDOW_SCALING_* in <window.h>
+    uint32_t mScalingMode;
+
+    // mTimestamp is the current timestamp for this buffer slot. This gets
+    // to set by queueBuffer each time this slot is queued. This value
+    // is guaranteed to be monotonically increasing for each newly
+    // acquired buffer.
+    int64_t mTimestamp;
+
+    // mIsAutoTimestamp indicates whether mTimestamp was generated
+    // automatically when the buffer was queued.
+    bool mIsAutoTimestamp;
+
+    // mFrameNumber is the number of the queued frame for this slot.
+    uint64_t mFrameNumber;
+
+    // mSlot is the slot index of this buffer (default INVALID_BUFFER_SLOT).
+    int mSlot;
+
+    // mIsDroppable whether this buffer was queued with the
+    // property that it can be replaced by a new buffer for the purpose of
+    // making sure dequeueBuffer() won't block.
+    // i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer
+    // was queued.
+    bool mIsDroppable;
+
+    // Indicates whether this buffer has been seen by a consumer yet
+    bool mAcquireCalled;
+
+    // Indicates this buffer must be transformed by the inverse transform of the screen
+    // it is displayed onto. This is applied after mTransform.
+    bool mTransformToDisplayInverse;
+};
+
+} // namespace android
+
+#endif