Fix speech flushing on Aura platforms in compat mode.

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

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js
index 8f20f28be389e6e3d2b07a8db823e0733e3c3955..4237af5815ff39b8b482defe7fae6f684e070cd6 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/desktop_automation_handler.js
@@ -141,10 +141,17 @@ DesktopAutomationHandler.prototype = {
       node = node.find({state: {focused: true}}) || node;
     }
 
-    if (this.isEditable_(evt.target))
-      this.createEditableTextHandlerIfNeeded_(evt.target);
+    if (this.isEditable_(node))
+      this.createEditableTextHandlerIfNeeded_(node);
 
-    this.onEventDefault({target: node, type: 'focus'});
+    // Since we queue output mostly for live regions support and there isn't a
+    // reliable way to know if this focus event resulted from a user's explicit
+    // action, only flush when the focused node is not web content.
+    if (node.root.role == RoleType.desktop)
+      Output.flushNextSpeechUtterance();
+
+    this.onEventDefault(
+        {target: node, type: chrome.automation.EventType.focus});
   },
 
   /**