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diff --git a/Source/WebKit/chromium/public/WebSpeechRecognizer.h b/Source/WebKit/chromium/public/WebSpeechRecognizer.h
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+/*
+ * Copyright (C) 2012 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 WebSpeechRecognizer_h
+#define WebSpeechRecognizer_h
+
+#include "WebSpeechRecognitionHandle.h"
+#include "platform/WebCommon.h"
+
+namespace WebKit {
+
+class WebSpeechGrammar;
+class WebSpeechRecognitionParams;
+class WebSpeechRecognizerClient;
+
+// Interface for speech recognition, to be implemented by the embedder.
+class WebSpeechRecognizer {
+public:
+    // Start speech recognition for the specified handle using the specified parameters. Notifications on progress, results, and errors will be sent via the client.
+    virtual void start(const WebSpeechRecognitionHandle&, const WebSpeechRecognitionParams&, WebSpeechRecognizerClient*) { WEBKIT_ASSERT_NOT_REACHED(); }
+
+    // Stop speech recognition for the specified handle, returning any results for the audio recorded so far. Notifications and errors are sent via the client.
+    virtual void stop(const WebSpeechRecognitionHandle&, WebSpeechRecognizerClient*) { WEBKIT_ASSERT_NOT_REACHED(); }
+
+    // Abort speech recognition for the specified handle, discarding any recorded audio. Notifications and errors are sent via the client.
+    virtual void abort(const WebSpeechRecognitionHandle&, WebSpeechRecognizerClient*) { WEBKIT_ASSERT_NOT_REACHED(); }
+
+protected:
+    virtual ~WebSpeechRecognizer() { }
+};
+
+} // namespace WebKit
+
+#endif // WebSpeechRecognizer_h