Initial skeleton for System Indicator API

chrome/common/extensions/api/experimental_system_indicator.idl

Index: chrome/common/extensions/api/experimental_system_indicator.idl
diff --git a/chrome/common/extensions/api/experimental_system_indicator.idl b/chrome/common/extensions/api/experimental_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.
+namespace experimental.systemIndicator {
+  interface Functions {
+    // Set the image to be used as an indicator icon.
+    //  Can be set by url:
+    static void setURL(DOMString path);
+    //  Or can be set by imageData derived from a canvas element.
+    static void setImageData([instanceOf=ImageData] object ImageData);
+
+    // Show the icon in the status tray.
+    static void show();
+    // Hide the icon from the status tray.
+    static void hide();
+  };
+
+  interface Events {
+    // Fired when a click does not result in a menu being shown.
+    static void onSystemIndicatorClicked();
+  };
+};