DevTools: [SSP] fix design glitches in "Insert New Rule"

Source/devtools/front_end/elements/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1120 matching lines @@
     selectorContainer.appendChild(openBrace);
     selectorContainer.addEventListener("mousedown", this._handleEmptySpaceMouseDown.bind(this), false);
     selectorContainer.addEventListener("click", this._handleSelectorContainerClick.bind(this), false);
 
     var closeBrace = document.createElement("div");
     closeBrace.textContent = "}";
     this.element.appendChild(closeBrace);
 
     if (this.editable && this.rule) {
         var newRuleButton = closeBrace.createChild("div", "sidebar-pane-button-new-rule");
+        newRuleButton.title = WebInspector.UIString("Insert Style Rule");
         newRuleButton.addEventListener("click", this._onNewRuleClick.bind(this), false);
     }
 
     this._selectorElement.addEventListener("click", this._handleSelectorClick.bind(this), false);
     this.element.addEventListener("mousedown", this._handleEmptySpaceMouseDown.bind(this), false);
     this.element.addEventListener("click", this._handleEmptySpaceClick.bind(this), false);
 
     if (this.rule) {
         // Prevent editing the user agent and user rules.
         if (this.rule.isUserAgent || this.rule.isUser)
@@ skipping 731 matching lines @@
  * @constructor
  * @extends {WebInspector.StylePropertiesSection}
  * @param {!WebInspector.StylesSidebarPane} stylesPane
  * @param {string} defaultSelectorText
  * @param {string} styleSheetId
  * @param {!WebInspector.TextRange} ruleLocation
  * @param {!WebInspector.CSSRule=} insertAfterRule
  */
 WebInspector.BlankStylePropertiesSection = function(stylesPane, defaultSelectorText, styleSheetId, ruleLocation, insertAfterRule)
 {
-    WebInspector.StylePropertiesSection.call(this, stylesPane, {selectorText: defaultSelectorText, rule: {isViaInspector: true}}, true, false);
+    var styleSheetHeader = WebInspector.cssModel.styleSheetHeaderForId(styleSheetId);
+    WebInspector.StylePropertiesSection.call(this, stylesPane, {selectorText: defaultSelectorText, rule: {isViaInspector: styleSheetHeader.isViaInspector()}}, true, false);
     this._ruleLocation = ruleLocation;
     this._styleSheetId = styleSheetId;
     if (insertAfterRule)
         this._createMediaList(insertAfterRule);
     this.element.classList.add("blank-section");
 }
 
 WebInspector.BlankStylePropertiesSection.prototype = {
     get isBlank()
     {
@@ skipping 1453 matching lines @@
         if (userEnteredText && (userEnteredText === userEnteredText.toUpperCase())) {
             for (var i = 0; i < results.length; ++i)
                 results[i] = results[i].toUpperCase();
         }
         var selectedIndex = this._cssCompletions.mostUsedOf(results);
         completionsReadyCallback(results, selectedIndex);
     },
 
     __proto__: WebInspector.TextPrompt.prototype
 }