Make views Slider accessible on Chrome OS

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 23b785a5b03ae04128b37d4f3228601e28dfa380..f5420e3a811573a17b5d14231dd893f791f75780 100644
--- a/chrome/common/extensions/api/experimental.accessibility.json
+++ b/chrome/common/extensions/api/experimental.accessibility.json
@@ -15,7 +15,7 @@
           "type": {
             "type": "string",
             "description": "The type of this object, which determines the contents of 'details'.",
-            "enum": ["button", "checkbox", "combobox", "link", "menu", "menuitem", "radiobutton", "tab", "textbox", "window"]
+            "enum": ["button", "checkbox", "combobox", "link", "menu", "menuitem", "radiobutton", "slider", "tab", "textbox", "window"]
           },
           "name": {
             "type": "string",
@@ -35,6 +35,7 @@
               { "$ref": "MenuDetails" },
               { "$ref": "MenuItemDetails" },
               { "$ref": "RadioButtonDetails" },
+              { "$ref": "SliderDetails" },
               { "$ref": "TabDetails" },
               { "$ref": "TextBoxDetails" }
             ]
@@ -97,6 +98,14 @@
         }
       },
       {
+        "id": "SliderDetails",
+        "type": "object",
+        "description": "Information about the state of a slider.",
+        "properties": {
+          "value": {"type": "string", "description": "The value of the slider as a string."}
+        }
+      },
+      {
         "id": "TabDetails",
         "type": "object",
         "description": "Additional accessibility information about a tab.",