DevTools: allow injecting stylesheets as themes.

Source/devtools/front_end/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 32 matching lines @@
     this._lastRequestId = 0;
     this._registeredExtensions = {};
     this._status = new WebInspector.ExtensionStatus();
 
     var commands = WebInspector.extensionAPI.Commands;
 
     this._registerHandler(commands.AddAuditCategory, this._onAddAuditCategory.bind(this));
     this._registerHandler(commands.AddAuditResult, this._onAddAuditResult.bind(this));
     this._registerHandler(commands.AddConsoleMessage, this._onAddConsoleMessage.bind(this));
     this._registerHandler(commands.AddRequestHeaders, this._onAddRequestHeaders.bind(this));
+    this._registerHandler(commands.ApplyStyleSheet, this._onApplyStyleSheet.bind(this));
     this._registerHandler(commands.CreatePanel, this._onCreatePanel.bind(this));
     this._registerHandler(commands.CreateSidebarPane, this._onCreateSidebarPane.bind(this));
     this._registerHandler(commands.CreateStatusBarButton, this._onCreateStatusBarButton.bind(this));
     this._registerHandler(commands.EvaluateOnInspectedPage, this._onEvaluateOnInspectedPage.bind(this));
     this._registerHandler(commands.ForwardKeyboardEvent, this._onForwardKeyboardEvent.bind(this));
     this._registerHandler(commands.GetHAR, this._onGetHAR.bind(this));
     this._registerHandler(commands.GetConsoleMessages, this._onGetConsoleMessages.bind(this));
     this._registerHandler(commands.GetPageResources, this._onGetPageResources.bind(this));
     this._registerHandler(commands.GetRequestContent, this._onGetRequestContent.bind(this));
     this._registerHandler(commands.GetResourceContent, this._onGetResourceContent.bind(this));
@@ skipping 125 matching lines @@
         for (var extension in this._extraHeaders) {
             var headers = this._extraHeaders[extension];
             for (name in headers) {
                 if (typeof headers[name] === "string")
                     allHeaders[name] = headers[name];
             }
         }
         NetworkAgent.setExtraHTTPHeaders(allHeaders);
     },
 
+    _onApplyStyleSheet: function(message)
+    {
+        if (!WebInspector.experimentsSettings.applyCustomStylesheet.isEnabled())
+            return;
+        var styleSheet = document.createElement("style");
+        styleSheet.textContent = message.styleSheet;
+        document.head.appendChild(styleSheet);
+    },
+
     _onCreatePanel: function(message, port)
     {
         var id = message.id;
         // The ids are generated on the client API side and must be unique, so the check below
         // shouldn't be hit unless someone is bypassing the API.
         if (id in this._clientObjects || id in WebInspector.panels)
             return this._status.E_EXISTS(id);
 
         var page = this._expandResourcePath(port._extensionOrigin, message.page);
         var panelDescriptor = new WebInspector.PanelDescriptor(id, message.title, undefined, undefined, new WebInspector.ExtensionPanel(id, page));
@@ skipping 719 matching lines @@
 
 WebInspector.extensionServer = new WebInspector.ExtensionServer();
 
 window.addExtension = function(page, name)
 {
     WebInspector.extensionServer._addExtension({
         startPage: page,
         name: name,
     });
 }