Several small extensions docs system fixes...

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "unprivileged": true,
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
@@ skipping 568 matching lines @@
       {
         "id": "Window",
         "type": "object",
         "properties": {
           "id": {"type": "integer", "minimum": 0, "description": "The ID of the window. Window IDs are unique within a browser session."},
           "focused": {"type": "boolean", "description": "Whether the window is currently the focused window."},
           "top": {"type": "integer", "description": "The offset of the window from the top edge of the screen in pixels."},
           "left": {"type": "integer", "description": "The offset of the window from the left edge of the screen in pixels."},
           "width": {"type": "integer", "description": "The width of the window in pixels."},
           "height": {"type": "integer", "description": "The height of the window in pixels."},
-          "tabs": {"type": "array", "items": { "$ref": "Tab" }, "optional": true, "description": "Array of <a href='tabs.html#type-Tab'>Tab</a> objects representing the current tabs in the window."},
+          "tabs": {"type": "array", "items": { "$ref": "Tab" }, "optional": true, "description": "Array of $ref:Tab objects representing the current tabs in the window."},
           "incognito": {"type": "boolean", "description": "Whether the window is incognito."},
           "type": {
             "type": "string",
             "description": "The type of browser window this is.",
             "enum": ["normal", "popup", "app"]
           }
         }
       }
     ],
     "properties": {
@@ skipping 57 matching lines @@
         "name": "getAll",
         "type": "function",
         "description": "Gets all windows.",
         "parameters": [
           {
             "type": "object",
             "name": "getInfo",
             "optional": true,
             "description": "",
             "properties": {
-              "populate": {"type": "boolean", "optional": true, "description": "If true, each window object will have a <var>tabs</var> property that contains a list of the <a href='tabs.html#type-Tab'>Tab</a> objects for that window." }
+              "populate": {"type": "boolean", "optional": true, "description": "If true, each window object will have a <var>tabs</var> property that contains a list of the $ref:Tab objects for that window." }
             }
           },
           {
             "type": "function",
             "name": "callback",
             "parameters": [
               {
                 "name": "windows", "type": "array", "items": { "$ref": "Window" }
               }
             ]
@@ skipping 3163 matching lines @@
       {
         "name": "onInputCancelled",
         "perExtensionEvent": true,
         "type": "function",
         "description": "User has ended the keyword input session without accepting the input.",
         "parameters": []
       }
     ]
   }
 ]