DevTools: Remove left margin when DevTools is docked

third_party/WebKit/Source/devtools/front_end/emulation/InspectedPagePlaceholder.js

 // Copyright 2014 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.
 /**
  * @unrestricted
  */
 Emulation.InspectedPagePlaceholder = class extends UI.Widget {
   constructor() {
     super(true);
     this.registerRequiredCSS('emulation/inspectedPagePlaceholder.css');
     UI.zoomManager.addEventListener(UI.ZoomManager.Events.ZoomChanged, this._scheduleUpdate, this);
     this._margins = {top: 0, right: 0, bottom: 0, left: 0};
     this.restoreMinimumSizeAndMargins();
   }
 
   _findMargins() {
     var margins = {top: 0, right: 0, bottom: 0, left: 0};
 
     if (this._useMargins) {
       var adjacent = {top: true, right: true, bottom: true, left: true};
       var widget = this;
       while (widget.parentWidget()) {
         var parent = widget.parentWidget();
         // This view assumes it's always inside the main split widget element, not a sidebar.
         // Every parent which is not a split widget, must be of the same size as this widget.
         if (parent instanceof UI.SplitWidget) {
           var side = parent.sidebarSide();
-          if (adjacent[side] && !parent.hasCustomResizer() && parent.isResizable())
-            margins[side] = Emulation.InspectedPagePlaceholder.MarginValue;

[dgozman, 2017/01/04 18:11:22]

Remove everything about margins from this file now.

[einbinder, 2017/01/05 20:41:00]

Done.

           adjacent[side] = false;
         }
         widget = parent;
       }
     }
 
     if (this._margins.top !== margins.top || this._margins.left !== margins.left ||
         this._margins.right !== margins.right || this._margins.bottom !== margins.bottom) {
       this._margins = margins;
       this._scheduleUpdate();
@@ skipping 49 matching lines @@
       width: Math.max(1, Math.round(rect.width))
     };
     this.dispatchEventToListeners(Emulation.InspectedPagePlaceholder.Events.Update, bounds);
   }
 };
 
 /** @enum {symbol} */
 Emulation.InspectedPagePlaceholder.Events = {
   Update: Symbol('Update')
 };
-
-Emulation.InspectedPagePlaceholder.MarginValue = 3;