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

chrome/browser/extensions/extension_tts_api.cc

 // 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 <string>
 #include <vector>
 
 #include "base/float_util.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
@@ skipping 61 matching lines @@
 
   if (options->HasKey(util::kVoiceNameKey))
     options->GetString(util::kVoiceNameKey, &voice_name_);
 
   if (options->HasKey(util::kLocaleKey))
     options->GetString(util::kLocaleKey, &locale_);
 
   if (options->HasKey(util::kGenderKey))
     options->GetString(util::kGenderKey, &gender_);
 
-  if (util::ReadNumberByKey(options, util::kRateKey, &rate_)) {
+  if (options->GetDouble(util::kRateKey, &rate_)) {
     if (!base::IsFinite(rate_) || rate_ < 0.0 || rate_ > 1.0)
       rate_ = -1.0;
   }
 
-  if (util::ReadNumberByKey(options, util::kPitchKey, &pitch_)) {
+  if (options->GetDouble(util::kPitchKey, &pitch_)) {
     if (!base::IsFinite(pitch_) || pitch_ < 0.0 || pitch_ > 1.0)
       pitch_ = -1.0;
   }
 
-  if (util::ReadNumberByKey(options, util::kVolumeKey, &volume_)) {
+  if (options->GetDouble(util::kVolumeKey, &volume_)) {
     if (!base::IsFinite(volume_) || volume_ < 0.0 || volume_ > 1.0)
       volume_ = -1.0;
   }
 
   if (options->HasKey(util::kEnqueueKey))
     options->GetBoolean(util::kEnqueueKey, &can_enqueue_);
 }
 
 Utterance::~Utterance() {
   DCHECK_EQ(completion_task_, static_cast<Task *>(NULL));
@@ skipping 274 matching lines @@
   int request_id;
   std::string error_message;
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &request_id));
   if (args_->GetSize() >= 2)
     EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &error_message));
   ExtensionTtsController::GetInstance()->OnSpeechFinished(
       request_id, error_message);
 
   return true;
 }