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diff --git a/Source/WebKit/chromium/public/WebSpellCheckClient.h b/Source/WebKit/chromium/public/WebSpellCheckClient.h
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+/*
+ * Copyright (C) 2010 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:
+ *
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 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 WebSpellCheckClient_h
+#define WebSpellCheckClient_h
+
+#include "WebString.h"
+
+namespace WebKit {
+
+class WebString;
+class WebTextCheckingCompletion;
+
+class WebSpellCheckClient {
+public:
+    // The client should perform spell-checking on the given text. If the
+    // text contains a misspelled word, then upon return misspelledOffset
+    // will point to the start of the misspelled word, and misspelledLength
+    // will indicates its length. Otherwise, if there was not a spelling
+    // error, then upon return misspelledLength is 0.
+    virtual void spellCheck(
+        const WebString& text, int& misspelledOffset, int& misspelledLength) { }
+    // Requests asynchronous spelling and grammar checking, whose result should be
+    // returned by passed completion object.
+    virtual void requestCheckingOfText(const WebString&, WebTextCheckingCompletion*) { }
+
+    // Computes an auto-corrected replacement for a misspelled word. If no
+    // replacement is found, then an empty string is returned.
+    virtual WebString autoCorrectWord(const WebString& misspelledWord) { return WebString(); }
+
+    // Show or hide the spelling UI.
+    virtual void showSpellingUI(bool show) { }
+
+    // Returns true if the spelling UI is showing.
+    virtual bool isShowingSpellingUI() { return false; }
+
+    // Update the spelling UI with the given word.
+    virtual void updateSpellingUIWithMisspelledWord(const WebString& word) { }
+
+protected:
+    ~WebSpellCheckClient() { }
+};
+
+} // namespace WebKit
+
+#endif