| Index: third_party/WebKit/Source/devtools/front_end/sources/XHRBreakpointsSidebarPane.js | 
| diff --git a/third_party/WebKit/Source/devtools/front_end/sources/XHRBreakpointsSidebarPane.js b/third_party/WebKit/Source/devtools/front_end/sources/XHRBreakpointsSidebarPane.js | 
| index e80946460c8310b373d38c4d8200f8a365129025..7a05db3b0f2a87115e8de2cfd5ffd9ce307f0d59 100644 | 
| --- a/third_party/WebKit/Source/devtools/front_end/sources/XHRBreakpointsSidebarPane.js | 
| +++ b/third_party/WebKit/Source/devtools/front_end/sources/XHRBreakpointsSidebarPane.js | 
| @@ -6,16 +6,22 @@ | 
| * @implements {UI.ToolbarItem.ItemsProvider} | 
| * @unrestricted | 
| */ | 
| -Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarPaneBase { | 
| +Sources.XHRBreakpointsSidebarPane = class extends UI.VBox { | 
| constructor() { | 
| -    super(); | 
| +    super(true); | 
| +    this.registerRequiredCSS('sources/xhrBreakpointsSidebarPane.css'); | 
| + | 
| +    this._listElement = this.contentElement.createChild('div', 'breakpoint-list hidden'); | 
| +    this._emptyElement = this.contentElement.createChild('div', 'gray-info-message'); | 
| +    this._emptyElement.textContent = Common.UIString('No Breakpoints'); | 
| + | 
| /** @type {!Map.<string, !Element>} */ | 
| this._breakpointElements = new Map(); | 
|  | 
| this._addButton = new UI.ToolbarButton(Common.UIString('Add breakpoint'), 'largeicon-add'); | 
| this._addButton.addEventListener(UI.ToolbarButton.Events.Click, this._addButtonClicked.bind(this)); | 
|  | 
| -    this.emptyElement.addEventListener('contextmenu', this._emptyElementContextMenu.bind(this), true); | 
| +    this._emptyElement.addEventListener('contextmenu', this._emptyElementContextMenu.bind(this), true); | 
| this._restoreBreakpoints(); | 
| this._update(); | 
| } | 
| @@ -40,9 +46,8 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| var inputElementContainer = createElementWithClass('p', 'breakpoint-condition'); | 
| inputElementContainer.textContent = Common.UIString('Break when URL contains:'); | 
|  | 
| -    var inputElement = inputElementContainer.createChild('span'); | 
| -    inputElement.id = 'breakpoint-condition-input'; | 
| -    this.addListElement(inputElementContainer, /** @type {?Element} */ (this.listElement.firstChild)); | 
| +    var inputElement = inputElementContainer.createChild('span', 'breakpoint-condition-input'); | 
| +    this._addListElement(inputElementContainer, /** @type {?Element} */ (this._listElement.firstChild)); | 
|  | 
| /** | 
| * @param {boolean} accept | 
| @@ -51,7 +56,7 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| * @this {Sources.XHRBreakpointsSidebarPane} | 
| */ | 
| function finishEditing(accept, e, text) { | 
| -      this.removeListElement(inputElementContainer); | 
| +      this._removeListElement(inputElementContainer); | 
| if (accept) { | 
| SDK.domDebuggerManager.addXHRBreakpoint(text, true); | 
| this._setBreakpoint(text, true); | 
| @@ -72,7 +77,7 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| return; | 
| } | 
|  | 
| -    var element = createElement('li'); | 
| +    var element = createElementWithClass('div', 'breakpoint-entry'); | 
| element._url = url; | 
| element.addEventListener('contextmenu', this._contextMenu.bind(this, url), true); | 
|  | 
| @@ -85,13 +90,13 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| label.classList.add('cursor-auto'); | 
| label.textElement.addEventListener('dblclick', this._labelClicked.bind(this, url), false); | 
|  | 
| -    var currentElement = /** @type {?Element} */ (this.listElement.firstChild); | 
| +    var currentElement = /** @type {?Element} */ (this._listElement.firstChild); | 
| while (currentElement) { | 
| if (currentElement._url && currentElement._url < element._url) | 
| break; | 
| currentElement = /** @type {?Element} */ (currentElement.nextSibling); | 
| } | 
| -    this.addListElement(element, currentElement); | 
| +    this._addListElement(element, currentElement); | 
| this._breakpointElements.set(url, element); | 
| } | 
|  | 
| @@ -103,10 +108,31 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| if (!element) | 
| return; | 
|  | 
| -    this.removeListElement(element); | 
| +    this._removeListElement(element); | 
| this._breakpointElements.delete(url); | 
| } | 
|  | 
| +  /** | 
| +   * @param {!Element} element | 
| +   * @param {?Node} beforeNode | 
| +   */ | 
| +  _addListElement(element, beforeNode) { | 
| +    this._listElement.insertBefore(element, beforeNode); | 
| +    this._emptyElement.classList.add('hidden'); | 
| +    this._listElement.classList.remove('hidden'); | 
| +  } | 
| + | 
| +  /** | 
| +   * @param {!Element} element | 
| +   */ | 
| +  _removeListElement(element) { | 
| +    this._listElement.removeChild(element); | 
| +    if (!this._listElement.firstChild) { | 
| +      this._emptyElement.classList.remove('hidden'); | 
| +      this._listElement.classList.add('hidden'); | 
| +    } | 
| +  } | 
| + | 
| _contextMenu(url, event) { | 
| var contextMenu = new UI.ContextMenu(event); | 
|  | 
| @@ -143,7 +169,7 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| var element = this._breakpointElements.get(url) || null; | 
| var inputElement = createElementWithClass('span', 'breakpoint-condition'); | 
| inputElement.textContent = url; | 
| -    this.listElement.insertBefore(inputElement, element); | 
| +    this._listElement.insertBefore(inputElement, element); | 
| element.classList.add('hidden'); | 
|  | 
| /** | 
| @@ -153,7 +179,7 @@ Sources.XHRBreakpointsSidebarPane = class extends Components.BreakpointsSidebarP | 
| * @this {Sources.XHRBreakpointsSidebarPane} | 
| */ | 
| function finishEditing(accept, e, text) { | 
| -      this.removeListElement(inputElement); | 
| +      this._removeListElement(inputElement); | 
| if (accept) { | 
| SDK.domDebuggerManager.removeXHRBreakpoint(url); | 
| this._removeBreakpoint(url); | 
|  |