Uses a system-wide notion of isSpeaking in the Mac extension TTS api.

chrome/common/extensions/api/tts.json

Index: chrome/common/extensions/api/tts.json
diff --git a/chrome/common/extensions/api/tts.json b/chrome/common/extensions/api/tts.json
index 31e79a132cd3f7b654a728600942111491844830..f6cb76be7c074157ed1b14ef6f979924f2afa8d0 100644
--- a/chrome/common/extensions/api/tts.json
+++ b/chrome/common/extensions/api/tts.json
@@ -183,7 +183,7 @@
       {
         "name": "isSpeaking",
         "type": "function",
-        "description": "Checks if the engine is currently speaking.",
+        "description": "Reports if the engine is currently speaking. Note: On Mac OS X, this will return true if the system speech engine is speaking, even if it wasn't initiated by Chrome.",

[kathyw, 2012/04/26 22:21:34]

"Reports if" is ambiguous. How about "Checks whether...". ("Reports if" could be
construed as "is called iff".)

Also, I believe that "this will return true" isn't strictly correct. (there's no
return value)

How about:

Checks whether the engine is currently speaking. On Mac OS X, the result is true
whenever the system speech engine is speaking, even if the speech wasn't
initiated by Chrome.

[David Tseng, 2012/04/26 23:20:42]

On 2012/04/26 22:21:34, kathyw wrote:

Done.

         "parameters": [
           {
             "type": "function",