Add test for ChromeVox injection into webview

chrome/browser/chromeos/accessibility/speech_monitor.cc

+// Copyright 2014 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/chromeos/accessibility/speech_monitor.h"
+
+namespace chromeos {
+
+namespace {
+const char kChromeVoxEnabledMessage[] = "chrome vox spoken feedback is ready";
+}  // anonymous namespace
+
+SpeechMonitor::SpeechMonitor() {
+  TtsController::GetInstance()->SetPlatformImpl(this);
+}
+
+SpeechMonitor::~SpeechMonitor() {
+  TtsController::GetInstance()->SetPlatformImpl(TtsPlatformImpl::GetInstance());
+}
+
+std::string SpeechMonitor::GetNextUtterance() {
+  if (utterance_queue_.empty()) {
+    loop_runner_ = new content::MessageLoopRunner();
+    loop_runner_->Run();
+    loop_runner_ = NULL;
+  }
+  std::string result = utterance_queue_.front();
+  utterance_queue_.pop_front();
+  return result;
+}
+
+bool SpeechMonitor::SkipChromeVoxEnabledMessage() {
+  return GetNextUtterance() == kChromeVoxEnabledMessage;
+}
+
+bool SpeechMonitor::PlatformImplAvailable() {
+  return true;
+}
+
+bool SpeechMonitor::Speak(
+    int utterance_id,
+    const std::string& utterance,
+    const std::string& lang,
+    const VoiceData& voice,
+    const UtteranceContinuousParameters& params) {
+  TtsController::GetInstance()->OnTtsEvent(
+      utterance_id,
+      TTS_EVENT_END,
+      static_cast<int>(utterance.size()),
+      std::string());
+  return true;
+}
+
+bool SpeechMonitor::StopSpeaking() {
+  return true;
+}
+
+bool SpeechMonitor::IsSpeaking() {
+  return false;
+}
+
+void SpeechMonitor::GetVoices(std::vector<VoiceData>* out_voices) {
+  out_voices->push_back(VoiceData());
+  VoiceData& voice = out_voices->back();
+  voice.native = true;
+  voice.name = "SpeechMonitor";
+  voice.events.insert(TTS_EVENT_END);
+}
+
+std::string SpeechMonitor::error() {
+  return "";
+}
+
+void SpeechMonitor::WillSpeakUtteranceWithVoice(const Utterance* utterance,
+                                                const VoiceData& voice_data) {
+  utterance_queue_.push_back(utterance->text());
+  if (loop_runner_.get())
+    loop_runner_->Quit();
+}
+
+}  // namespace chromeos