Use new APIs in base/values.h: Value::GetAsNumber and DictionaryValue::GetNumber.

chrome/browser/extensions/extension_tts_api_util.h

Index: chrome/browser/extensions/extension_tts_api_util.h
diff --git a/chrome/browser/extensions/extension_tts_api_util.h b/chrome/browser/extensions/extension_tts_api_util.h
index 9d13e75e98790b7a846a4866aa5629c5b89bd9aa..4ca782c0b9d502bca2ec3a1e9ced4cbe9cecc5d9 100644
--- a/chrome/browser/extensions/extension_tts_api_util.h
+++ b/chrome/browser/extensions/extension_tts_api_util.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -19,9 +19,5 @@ extern const char kPitchKey[];
 extern const char kVolumeKey[];
 extern const char kEnqueueKey[];
 
-bool ReadNumberByKey(DictionaryValue* dict,
-                     const char* key,
-                     double* ret_value);
-
 }  // namespace extension_tts_api_util.
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TTS_API_UTIL_H_