Adjust ChromeVox (spoken feedback) strings and make it possible for announcemen

chrome/common/extensions/api/experimental_accessibility.json

Index: chrome/common/extensions/api/experimental_accessibility.json
diff --git a/chrome/common/extensions/api/experimental_accessibility.json b/chrome/common/extensions/api/experimental_accessibility.json
index da3536e92642427a7613a030f93b2a99c6af10d7..4b3a007cb037a85cab4430b3b82291638daf6511 100644
--- a/chrome/common/extensions/api/experimental_accessibility.json
+++ b/chrome/common/extensions/api/experimental_accessibility.json
@@ -293,6 +293,30 @@
             "description": "Information about the menu that was closed."
           }
         ]
+      },
+      {
+        "name": "onSpokenFeedbackEnabled",
+        "type": "function",
+        "description": "Fired when spoken feedback is enabled.",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "type": "boolean",
+                "name": "makeAnnouncements",
+                "description": "Whether to make introductory announcements."
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "onSpokenFeedbackDisabled",
+        "type": "function",
+        "description": "Fired when spoken feedback is disabled."
       }
     ]
   }