Sample extensions page does not feature chrome.ttsEngine.

chrome/common/extensions/docs/examples/api/ttsEngine/console_tts_engine/console_tts_engine.js

Index: chrome/common/extensions/docs/examples/api/ttsEngine/console_tts_engine/console_tts_engine.js
diff --git a/chrome/common/extensions/docs/examples/api/ttsEngine/console_tts_engine/console_tts_engine.js b/chrome/common/extensions/docs/examples/api/ttsEngine/console_tts_engine/console_tts_engine.js
new file mode 100644
index 0000000000000000000000000000000000000000..3f69094fa92c7d7496d03e1563f849f289291e39
--- /dev/null
+++ b/chrome/common/extensions/docs/examples/api/ttsEngine/console_tts_engine/console_tts_engine.js
@@ -0,0 +1,115 @@
+// Copyright (c) 2012 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.
+
+var timeoutId;
+var ttsId = -1;
+var ttsWindow;
+var milliseconds;
+var curOptions;
+
+function areNewOptions(options) {
+  var properties = ['voiceName', 'lang', 'gender', 'rate', 'pitch', 'volume'];
+
+  for (var i = 0; i < properties.length; ++i) {
+    if (options[properties[i]] != curOptions[properties[i]]) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function getTtsElement(element) {
+  return ttsWindow.document.getElementById(element);
+}
+
+function appendText(text) {
+  getTtsElement("text").innerHTML += text;
+}
+
+function logOptions() {
+  getTtsElement("voiceName").innerHTML = curOptions.voiceName;
+  getTtsElement("lang").innerHTML = curOptions.lang;
+  getTtsElement("gender").innerHTML = curOptions.gender;
+  getTtsElement("rate").innerHTML = curOptions.rate;
+  getTtsElement("pitch").innerHTML = curOptions.pitch;
+  getTtsElement("volume").innerHTML = curOptions.volume;
+}
+
+function logUtterance(utterance, index, sendTtsEvent) {
+  if (index == utterance.length) {
+    sendTtsEvent({'type': 'end', 'charIndex': utterance.length});
+    return;
+  }
+
+  appendText(utterance[index]);
+
+  if (utterance[index] == ' ') {
+    sendTtsEvent({'type': 'word', 'charIndex': index});
+  }
+  else if (utterance[index] == '.' ||
+      utterance[index] == '?' ||
+      utterance[index] == '!') {
+    sendTtsEvent({'type': 'sentence', 'charIndex': index});
+  }
+
+  timeoutId = setTimeout(function() {
+    logUtterance(utterance, ++index, sendTtsEvent)
+  }, milliseconds);
+}
+
+var speakListener = function(utterance, options, sendTtsEvent) {
+  clearTimeout(timeoutId);
+
+  sendTtsEvent({'type': 'start', 'charIndex': 0});
+
+  if (ttsId == -1) {
+    // Create a new window that overlaps the bottom 40% of the current window
+    chrome.windows.getCurrent(function(curWindow) {
+      chrome.windows.create(
+          {"url": "console_tts_engine.html",
+           "focused": false,
+           "top": Math.round(curWindow.top + 6/10 * curWindow.height),
+           "left": curWindow.left,
+           "width": curWindow.width,
+           "height": Math.round(4/10 * curWindow.height)},
+          function(newWindow) {
+            ttsId = newWindow.id;
+            ttsWindow = chrome.extension.getViews({"windowId": ttsId})[0];
+
+            curOptions = options;
+            logOptions();
+
+            // Fastest timeout == 1 ms (@ options.rate = 10.0)
+            milliseconds = 10 / curOptions.rate;
+            logUtterance(utterance, 0, sendTtsEvent);
+          }
+      );
+    });
+  } else {
+    if (areNewOptions(options)) {
+      curOptions = options;
+      logOptions();
+
+      milliseconds = 10 / curOptions.rate;
+    }
+
+    logUtterance(utterance, 0, sendTtsEvent);
+  }
+
+};
+
+var stopListener = function() {
+  clearTimeout(timeoutId);
+};
+
+var removedListener = function(windowId, removeInfo) {
+  if (ttsId == windowId) {
+    ttsId = -1;
+  }
+}
+
+chrome.ttsEngine.onSpeak.addListener(speakListener);
+chrome.ttsEngine.onStop.addListener(stopListener);
+chrome.windows.onRemoved.addListener(removedListener);