Implement Google network speech synthesis

chrome/browser/resources/network_speech_synthesis/manifest.json

+{
+   "background": {
+      "scripts": [ "tts_extension.js" ],
+      "persistent": false
+   },
+   "description": "Component extension providing speech via the Google network text-to-speech service.",
+   "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA8GSbNUMGygqQTNDMFGIjZNcwXsHLzkNkHjWbuY37PbNdSDZ4VqlVjzbWqODSe+MjELdv5Keb51IdytnoGYXBMyqKmWpUrg+RnKvQ5ibWr4MW9pyIceOIdp9GrzC1WZGgTmZismYR3AjaIpufZ7xDdQQv+XrghPWCkdVqLN+qZDA1HU+DURznkMICiDDSH2sU0egm9UbWfS218bZqzKeQDiC3OnTPlaxcbJtKUuupIm5knjze3Wo9Ae9poTDMzKgchg0VlFCv3uqox+wlD8sjXBoyBCCK9HpImdVAF1a7jpdgiUHpPeV/26oYzM9/grltwNR3bzECQgSpyXp0eyoegwIDAQAB",
+   "manifest_version": 2,
+   "name": "Google Network Speech",
+   "permissions": [
+     "systemPrivate",
+     "ttsEngine",
+     "https://www.google.com/"
+   ],
+   "tts_engine": {
+      "voices": [
+         {
+           "event_types": [ "start", "end", "error" ],

[David Tseng, 2013/10/17 20:43:49]

interrupted?

What happens when a client of chrome.tts calls stop()?

[dmazzoni, 2013/10/18 16:23:19]

Interrupted and Cancelled are implemented automatically by TtsController. An
extension implementing the tts_engine api doesn't have to implement it.

+           "gender": "female",
+           "lang": "en-US",
+           "voice_name": "Google Network Speech US English"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "male",

[David Tseng, 2013/10/17 20:43:49]

The only male in the bunch? Is there a choice of male or female offered by the
network tts?

[dmazzoni, 2013/10/18 16:23:19]

Glen can correct me if I'm wrong, but currently the network speech API doesn't
have a parameter to request a gender or a specific voice. You can only specify
the language and it gives you the best match.

Hopefully we can upgrade this in the future.

+           "lang": "en-GB",
+           "voice_name": "Google Network Speech UK English"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "es-ES",
+           "voice_name": "Google Network Speech Spanish"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "fr-FR",
+           "voice_name": "Google Network Speech French"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "it-IT",
+           "voice_name": "Google Network Speech Italian"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "de-DE",
+           "voice_name": "Google Network Speech German"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "ja-JP",
+           "voice_name": "Google Network Speech Japanese"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",
+           "lang": "ko-KR",
+           "voice_name": "Google Network Speech Korean"
+         },
+         {
+           "event_types": [ "start", "end", "error" ],
+           "gender": "female",

[David Tseng, 2013/10/17 20:43:49]

Are the genders subject to change? How did you generate this list of genders?

[dmazzoni, 2013/10/18 16:23:19]

I tested it out and made this match what's currently served.

+           "lang": "zh-CN",
+           "voice_name": "Google Network Speech Mandarin Chinese"

[David Tseng, 2013/10/17 20:43:49]

Do these voice names get localized at some point?

[dmazzoni, 2013/10/18 16:23:19]

It would be possible to get these localized but we'd have to put them through
the translation console manually and stick the translated resluts into the
extension's messages file. Do you think we should localize each of these strings
into every language?

The other option would just be to just use a language's local name, i.e.
Francais, Deutch, etc. but not translate the rest. Does that sound better in the
interim, or not worth it?

+         }
+       ]
+   },
+   "version": "1.0"
+}