Separate host desktop related functionality into remoting.HostDesktop

remoting/webapp/crd/js/host_desktop.js

Index: remoting/webapp/crd/js/host_desktop.js
diff --git a/remoting/webapp/crd/js/host_desktop.js b/remoting/webapp/crd/js/host_desktop.js
new file mode 100644
index 0000000000000000000000000000000000000000..c18f48969b09b022c82cda9f1b87243718768357
--- /dev/null
+++ b/remoting/webapp/crd/js/host_desktop.js
@@ -0,0 +1,51 @@
+// Copyright 2015 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.
+
+/**
+ * @fileoverview
+ * Interface abstracting the functionality of the HostDesktop.
+ */
+
+var remoting = remoting || {};
+
+(function() {
+
+'use strict';
+
+/**
+ * @interface
+ * @extends {base.EventSource}
+ */
+remoting.HostDesktop = function() {};
+
+/** @return {boolean} Whether the host supports desktop resizing. */
+remoting.HostDesktop.prototype.isResizable = function() {};
+
+/** @enum {string} */
+remoting.HostDesktop.Events = {
+  // Fired when the size of the host desktop changes with the desktop dimensions
+  //  {{width:number, height:number, xDpi:number, yDpi:number}}
+  sizeChanged: 'sizeChanged',
+  // Fired when the shape of the host desktop changes with an array of
+  // rectangles of desktop shapes as the event data.
+  //   Array<{left:number, top:number, width:number, height:number}>
+  shapeChanged: 'shapeChanged'
+};
+
+/**
+ * @return {{width:number, height:number, xDpi:number, yDpi:number}}
+ *  The dimensions and DPI settings of the host desktop.
+ */
+remoting.HostDesktop.prototype.getDimensions = function() {};
+
+/**
+ * Resize the desktop of the host to |width|, |height| and |deviceScale|.
+ *
+ * @param {number} width The width of the desktop in DIPs.
+ * @param {number} height The height of the desktop in DIPs.
+ * @param {number} deviceScale
+ */
+remoting.HostDesktop.prototype.resize = function(width, height, deviceScale) {};
+
+})();