Add extension API to change window show state using chrome.windows.update().

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
           "tab": {"$ref": "Tab", "optional": true, "description":"This property will <b>only</b> be present when the connection was opened from a tab or content script."},
@@ skipping 1139 matching lines @@
           "top": {"type": "integer", "description": "The offset of the window from the top edge of the screen in pixels."},
           "left": {"type": "integer", "description": "The offset of the window from the left edge of the screen in pixels."},
           "width": {"type": "integer", "description": "The width of the window in pixels."},
           "height": {"type": "integer", "description": "The height of the window in pixels."},
           "tabs": {"type": "array", "items": { "$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"]
+            }
         }
       }
     ],
     "properties": {
       "WINDOW_ID_NONE": {
         "type": "integer",
         "value": "-1",
         "description": "The windowId value that represents the absence of a chrome browser window."
       }
     },
@@ skipping 127 matching lines @@
           {"type": "integer", "name": "windowId", "minimum": 0},
           {
             "type": "object",
             "name": "updateInfo",
             "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 set to false or if the window already has focus."}
+              "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 set to false or if the window already has focus."},
+              "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"]
+              }
             }
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
             "parameters": [
               {
                 "name": "window", "$ref": "Window"
               }
@@ skipping 7921 matching lines @@
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]