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diff --git a/widget/gonk/libui/Tokenizer.h b/widget/gonk/libui/Tokenizer.h
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+++ b/widget/gonk/libui/Tokenizer.h
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+/*
+ * Copyright (C) 2010 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 _UTILS_TOKENIZER_H
+#define _UTILS_TOKENIZER_H
+
+#include <assert.h>
+#include <utils/Errors.h>
+#include <utils/FileMap.h>
+#include <utils/String8.h>
+
+namespace android {
+
+/**
+ * A simple tokenizer for loading and parsing ASCII text files line by line.
+ */
+class Tokenizer {
+    Tokenizer(const String8& filename, FileMap* fileMap, char* buffer,
+            bool ownBuffer, size_t length);
+
+public:
+    ~Tokenizer();
+
+    /**
+     * Opens a file and maps it into memory.
+     *
+     * Returns NO_ERROR and a tokenizer for the file, if successful.
+     * Otherwise returns an error and sets outTokenizer to NULL.
+     */
+    static status_t open(const String8& filename, Tokenizer** outTokenizer);
+
+    /**
+     * Prepares to tokenize the contents of a string.
+     *
+     * Returns NO_ERROR and a tokenizer for the string, if successful.
+     * Otherwise returns an error and sets outTokenizer to NULL.
+     */
+    static status_t fromContents(const String8& filename,
+            const char* contents, Tokenizer** outTokenizer);
+
+    /**
+     * Returns true if at the end of the file.
+     */
+    inline bool isEof() const { return mCurrent == getEnd(); }
+
+    /**
+     * Returns true if at the end of the line or end of the file.
+     */
+    inline bool isEol() const { return isEof() || *mCurrent == '\n'; }
+
+    /**
+     * Gets the name of the file.
+     */
+    inline String8 getFilename() const { return mFilename; }
+
+    /**
+     * Gets a 1-based line number index for the current position.
+     */
+    inline int32_t getLineNumber() const { return mLineNumber; }
+
+    /**
+     * Formats a location string consisting of the filename and current line number.
+     * Returns a string like "MyFile.txt:33".
+     */
+    String8 getLocation() const;
+
+    /**
+     * Gets the character at the current position.
+     * Returns null at end of file.
+     */
+    inline char peekChar() const { return isEof() ? '\0' : *mCurrent; }
+
+    /**
+     * Gets the remainder of the current line as a string, excluding the newline character.
+     */
+    String8 peekRemainderOfLine() const;
+
+    /**
+     * Gets the character at the current position and advances past it.
+     * Returns null at end of file.
+     */
+    inline char nextChar() { return isEof() ? '\0' : *(mCurrent++); }
+
+    /**
+     * Gets the next token on this line stopping at the specified delimiters
+     * or the end of the line whichever comes first and advances past it.
+     * Also stops at embedded nulls.
+     * Returns the token or an empty string if the current character is a delimiter
+     * or is at the end of the line.
+     */
+    String8 nextToken(const char* delimiters);
+
+    /**
+     * Advances to the next line.
+     * Does nothing if already at the end of the file.
+     */
+    void nextLine();
+
+    /**
+     * Skips over the specified delimiters in the line.
+     * Also skips embedded nulls.
+     */
+    void skipDelimiters(const char* delimiters);
+
+private:
+    Tokenizer(const Tokenizer& other); // not copyable
+
+    String8 mFilename;
+    FileMap* mFileMap;
+    char* mBuffer;
+    bool mOwnBuffer;
+    size_t mLength;
+
+    const char* mCurrent;
+    int32_t mLineNumber;
+
+    inline const char* getEnd() const { return mBuffer + mLength; }
+
+};
+
+} // namespace android
+
+#endif // _UTILS_TOKENIZER_H