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

chrome/browser/extensions/extension_tts_api_util.cc

-// 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.
 
 #include "chrome/browser/extensions/extension_tts_api_util.h"
 
 namespace extension_tts_api_util {
 
 const char kVoiceNameKey[] = "voiceName";
 const char kLocaleKey[] = "locale";
 const char kGenderKey[] = "gender";
 const char kRateKey[] = "rate";
 const char kPitchKey[] = "pitch";
 const char kVolumeKey[] = "volume";
 const char kEnqueueKey[] = "enqueue";
 
-// Static.
-bool ReadNumberByKey(DictionaryValue* dict,
-                     const char* key,
-                     double* ret_value) {
-  Value* value;
-  if (!dict->Get(key, &value))
-    return false;
-
-  if (value->IsType(Value::TYPE_INTEGER)) {
-    int int_value;
-    if (!dict->GetInteger(key, &int_value))
-      return false;
-    *ret_value = int_value;
-  } else if (value->IsType(Value::TYPE_DOUBLE)) {
-    if (!dict->GetDouble(key, ret_value))
-      return false;
-  } else {
-    return false;
-  }
-  return true;
-}
-
 }  // namespace extension_tts_api_util.