Add fullscreen state support for chrome.windows

chrome/common/extensions/api/windows.json

 [
   {
     "namespace": "windows",
     "dependencies": [ "tabs" ],
     "types": [
       {
         "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 $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", "panel", "app"]
           },
           "state": {
             "type": "string",
             "description": "The state of this browser window.",
-            "enum": ["normal", "minimized", "maximized"]
+            "enum": ["normal", "minimized", "maximized", "fullscreen"]
             }
         }
       }
     ],
     "properties": {
       "WINDOW_ID_NONE": {
         "type": "integer",
         "value": "-1",
         "description": "The windowId value that represents the absence of a chrome browser window."
       },
@@ skipping 164 matching lines @@
             "properties": {
               "left": {"type": "integer", "optional": true, "description": "The offset from the left edge of the screen to move the window to in pixels. This value is ignored for panels."},
               "top": {"type": "integer", "optional": true, "description": "The offset from the top edge of the screen to move the window to in pixels. This value is ignored for panels."},
               "width": {"type": "integer", "minimum": 0, "optional": true, "description": "The width to resize the window to in pixels. This value is ignored for panels."},
               "height": {"type": "integer", "minimum": 0, "optional": true, "description": "The height to resize the window to in pixels. This value is ignored for panels."},
               "focused": {"type": "boolean", "optional": true, "description": "If true, brings the window to the front. If false, brings the next window in the z-order to the front."},
               "drawAttention": {"type": "boolean", "optional": true, "description": "If true, causes the window to be displayed in a manner that draws the user's attention to the window, without changing the focused window. The effect lasts until the user changes focus to the window. This option has no effect if the window already has focus. Set to false to cancel a previous draw attention request."},
               "state": {
                 "type": "string",
                 "optional": true,
-                "description": "The new state of the window. The 'minimized' and 'maximized' states cannot be combined with 'left', 'top', 'width' or 'height'.",
-                "enum": ["normal", "minimized", "maximized"]
+                "description": "The new state of the window. The 'minimized', 'maximized' and 'fullscreen' states cannot be combined with 'left', 'top', 'width' or 'height'.",
+                "enum": ["normal", "minimized", "maximized", "fullscreen"]
               }
             }
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
             "parameters": [
               {
                 "name": "window", "$ref": "Window"
@@ skipping 37 matching lines @@
         "name": "onFocusChanged",
         "type": "function",
         "description": "Fired when the currently focused window changes. Will be chrome.windows.WINDOW_ID_NONE if all chrome windows have lost focus. Note: On some Linux window managers, WINDOW_ID_NONE will always be sent immediately preceding a switch from one chrome window to another.",
         "parameters": [
           {"type": "integer", "name": "windowId", "minimum": -1, "description": "ID of the newly focused window."}
         ]
       }
     ]
   }
 ]