Initial skeleton for System Indicator API

chrome/common/extensions/api/system_indicator.idl

Index: chrome/common/extensions/api/system_indicator.idl
diff --git a/chrome/common/extensions/api/system_indicator.idl b/chrome/common/extensions/api/system_indicator.idl
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Manages an app's system indicator icon, an image displayed in the system's
+// menubar, system tray, or other visible area provided by the OS.
+// This is modelled after the other extension action APIs, such as
+// chrome.browserAction and chrome.pageAction.
+namespace systemIndicator {
+  dictionary SetIconDetails {
+    any? path;
+    any? imageData;
+  };
+
+  callback DoneCallback = void ();
+
+  interface Functions {
+    // Set the image to be used as an indicator icon, using a set of ImageData
+    // objects. These objects should have multiple resolutions so that an
+    // appropriate size can be selected for the given icon size and DPI scaling
+    // settings. Only square ImageData objects are accepted.
+    static void setIcon(SetIconDetails details, optional DoneCallback callback);
+
+    // Show the icon in the status tray.
+    static void enable();
+
+    // Hide the icon from the status tray.
+    static void disable();
+  };
+
+  interface Events {
+    // Fired only when a click on the icon does not result in a menu being
+    // shown.
+    static void onClicked();
+  };
+};