Allow client nodes to gain ChromeVox range.

Notificaiton center now fires a focus event on a view that has no role (i.e. a client node). Allow for this so that we pick up on the window ax obj's name "notification center" and override client output to be $name (avoiding the role which provides no value).

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
BUG=643995
TEST=alt+shift+n

Review-Url: https://codereview.chromium.org/2383103003
Cr-Commit-Position: refs/heads/master@{#422607}

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

@@ -244,8 +244,8 @@ DesktopAutomationHandler.prototype = {
 
     var node = evt.target;
 
-    // Discard focus events on embeddedObject and client nodes.
-    if (node.role == RoleType.embeddedObject || node.role == RoleType.client)
+    // Discard focus events on embeddedObject.
+    if (node.role == RoleType.embeddedObject)
       return;
 
     this.createTextEditHandlerIfNeeded_(evt.target);

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

@@ -429,6 +429,9 @@ Output.RULES = {
       speak: '$if($checked, $earcon(CHECK_ON), $earcon(CHECK_OFF)) ' +
              '$name $role $checked $description $state'
     },
+    client: {
+      speak: '$name'
+    },
     date: {
       enter: '$nameFromNode $role $description'
     },