Add audible, muted to Tab, c.t.query, c.t.update, and c.t.onUpdated where relevant

chrome/test/data/extensions/api_test/tab_capture/api_tests.js

Index: chrome/test/data/extensions/api_test/tab_capture/api_tests.js
diff --git a/chrome/test/data/extensions/api_test/tab_capture/api_tests.js b/chrome/test/data/extensions/api_test/tab_capture/api_tests.js
index 8f3e1d168ffaf9d2717c2d1ad3448292348cdd90..c9621e84b06b5e8818ef2a4ea5adaea3b5360cd3 100644
--- a/chrome/test/data/extensions/api_test/tab_capture/api_tests.js
+++ b/chrome/test/data/extensions/api_test/tab_capture/api_tests.js
@@ -29,7 +29,7 @@ chrome.test.runTests([
   },
 
   function getCapturedTabs() {
-    chrome.tabs.create({active:true}, function(secondTab) {
+    chrome.tabs.create({active: true}, function(secondTab) {
       // chrome.tabCapture.capture() will only capture the active tab.
       chrome.test.assertTrue(secondTab.active);
 
@@ -97,6 +97,34 @@ chrome.test.runTests([
     });
   },
 
+  function tabIsUnmutedWhenTabCaptured() {
+    var stream1 = null;
+
+    chrome.tabs.getCurrent(function(tab) {
+      chrome.test.listenForever(chrome.tabs.onUpdated,

[not at google - send to devlin, 2015/06/04 00:00:05]

you should also stop listening to this,

var stopListening = chrome.test.listenForever...;

then call stopListening before calling chrome.test.succeed(). in fact that may
automatically call succeed :\

+          function(tabId, changeInfo, updatedTab) {
+        var expectedMutedCause = "capture";
+        var expectedMuted = false;

[not at google - send to devlin, 2015/06/04 00:00:05]

I actually find these harder to read than just

if (changeInfo.muted === false &&
    changeInfo.mutedCase == 'capture') {
  chrome.test.assertEq(false, updatedTab.muted);
  chrome.test.assertEq('capture', updatedTab.mutedCause);
  ...
}

+
+        if ((changeInfo["mutedCause"] == expectedMutedCause) &&
+            (changeInfo["muted"] === expectedMuted)) {
+          chrome.test.assertEq(expectedMutedCause, updatedTab.mutedCause);
+          chrome.test.assertEq(expectedMuted, updatedTab.muted);
+          stream1.stop();
+          chrome.test.succeed();
+        }
+      });
+
+      chrome.tabs.update(tab.id, {muted: true}, function(newTab) {
+        setTimeout(function() {
+          tabCapture.capture({audio: true}, function(stream) {
+            stream1 = stream;
+          });
+        }, 200);
+      });

[not at google - send to devlin, 2015/06/04 00:00:05]

Ok, I see your point. This is hard to fit into some sort of framework. Maybe
after the chrome.tabs.update() you should be watching for a muted change, and
then start the capture now that you know it's muted, and then wait for the
capture change? would that work?

sorry if you've already gone through all of this.

+    });
+  },
+
   function onlyVideo() {
     tabCapture.capture({video: true}, function(stream) {
       chrome.test.assertTrue(!!stream);