Revise accessibility for Date/TimeView.

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
index f9768fa3c9c2e5c973541a25bc1f4bd5aaf6274a..ffcf394d5830f59385781d7f78cabd8aaa8d6124 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
@@ -635,11 +635,29 @@ Background.prototype = {
                        cvox.QueueMode.FLUSH);
         return false;
       case 'speakTimeAndDate':
-        var output = new Output();
-        var dateTime = new Date();
-        output.withString(
-            dateTime.toLocaleTimeString() +
-                ', ' + dateTime.toLocaleDateString()).go();
+        chrome.automation.getDesktop(function(d) {
+          // First, try speaking the on-screen time.
+          var allTime = d.findAll({role: RoleType.time});

[dmazzoni, 2016/05/06 15:53:14]

Not for this change, but I think it'd be useful if we
could do a findAll but limit to one tree.

[David Tseng, 2016/05/06 20:40:14]

Agreed; in this case, it would involve a leaf predicate that restricts
descending into rootWebArea nodes and a root predicate for desktop (and
descending into an initial subtree). (a tree "cutout"). I have a cl to do this
in the works.

+          allTime.filter(function(t) {
+            return t.root.role == RoleType.desktop;
+          });
+
+          var timeString = '';
+          allTime.forEach(function(t) {
+            if (t.name)
+              timeString = t.name;
+          });
+          if (timeString) {
+            cvox.ChromeVox.tts.speak(timeString, cvox.QueueMode.FLUSH);
+          } else {
+            // Fallback to the old way of speaking time.
+            var output = new Output();
+            var dateTime = new Date();
+            output.withString(
+                dateTime.toLocaleTimeString() +
+                    ', ' + dateTime.toLocaleDateString()).go();
+          }
+        });
         return false;
       case 'readCurrentTitle':
         var target = this.currentRange_.start.node;