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diff --git a/Source/WebKit/chromium/public/android/WebDOMTextContentWalker.h b/Source/WebKit/chromium/public/android/WebDOMTextContentWalker.h
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+/*
+ * Copyright (C) 2011 Google 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 WebDOMTextContentWalker_h
+#define WebDOMTextContentWalker_h
+
+#include "../WebPrivateOwnPtr.h"
+#include "../WebRange.h"
+#include "../WebString.h"
+
+namespace WebCore {
+class DOMTextContentWalker;
+class Node;
+}
+
+namespace WebKit {
+
+class WebHitTestInfo;
+
+class WebDOMTextContentWalker {
+public:
+    WebDOMTextContentWalker();
+    ~WebDOMTextContentWalker();
+
+    // Creates a new text content walker centered in the position described by the hit test.
+    // The maximum length of the contents retrieved by the walker is defined by maxLength.
+    WEBKIT_API WebDOMTextContentWalker(const WebHitTestInfo&, size_t maxLength);
+
+    // Creates a new text content walker centered in the selected offset of the given text node.
+    // The maximum length of the contents retrieved by the walker is defined by maxLength.
+    WEBKIT_API WebDOMTextContentWalker(WebCore::Node* textNode, size_t offset, size_t maxLength);
+
+    // Text content retrieved by the walker.
+    WEBKIT_API WebString content() const;
+
+    // Position of the initial text node offset in the content string.
+    WEBKIT_API size_t hitOffsetInContent() const;
+
+    // Convert start/end positions in the content text string into a WebKit text range.
+    WEBKIT_API WebRange contentOffsetsToRange(size_t startInContent, size_t endInContent);
+
+protected:
+    WebPrivateOwnPtr<WebCore::DOMTextContentWalker> m_private;
+};
+
+} // namespace WebKit
+
+#endif