Make the extension's sidebar pane auto-resizable.

third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 322 matching lines @@
     sidebarPanes: function()
     {
         return this._sidebarPanes;
     },
 
     _onSetSidebarHeight: function(message)
     {
         var sidebar = this._clientObjects[message.id];
         if (!sidebar)
             return this._status.E_NOTFOUND(message.id);
-        sidebar.setHeight(message.height);
+
+        console.warn("Setting height of the SidebarPane is deprecated.");

[caseq, 2016/04/20 01:20:50]

Let's move that to front-end API instead, so the server-side method can be nuked
altogether -- we already have some precedents there:
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

+
         return this._status.OK();
     },
 
     _onSetSidebarContent: function(message, port)
     {
         var sidebar = this._clientObjects[message.id];
         if (!sidebar)
             return this._status.E_NOTFOUND(message.id);
 
         /**
@@ skipping 727 matching lines @@
 /**
  * @typedef {{code: string, description: string, details: !Array.<*>}}
  */
 WebInspector.ExtensionStatus.Record;
 
 WebInspector.extensionAPI = {};
 defineCommonExtensionSymbols(WebInspector.extensionAPI);
 
 /** @type {!WebInspector.ExtensionServer} */
 WebInspector.extensionServer;