DevTools: make sidebar section headers wider.

third_party/WebKit/Source/devtools/front_end/ui/SplitWidget.js

 /*
  * Copyright (C) 2012 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 459 matching lines @@
             return;
 
         if (!this._resizerElementSize)
             this._resizerElementSize = this._isVertical ? this._resizerElement.offsetWidth : this._resizerElement.offsetHeight;
 
         // Invalidate layout below.
 
         this._removeAllLayoutProperties();
 
         // this._totalSizeDIP is available below since we successfully applied constraints.
-        var sidebarSizeValue = WebInspector.zoomManager.dipToCSS(sizeDIP) + "px";
-        var mainSizeValue = (this._totalSizeCSS - WebInspector.zoomManager.dipToCSS(sizeDIP)) + "px";
+        var roundSizeCSS = Math.round(WebInspector.zoomManager.dipToCSS(sizeDIP));
+        var sidebarSizeValue = roundSizeCSS + "px";
+        var mainSizeValue = (this._totalSizeCSS - roundSizeCSS) + "px";
         this._sidebarElement.style.flexBasis = sidebarSizeValue;
 
         // Make both sides relayout boundaries.
         if (this._isVertical) {
             this._sidebarElement.style.width = sidebarSizeValue;
             this._mainElement.style.width = mainSizeValue;
             this._sidebarElement.style.height = this._totalSizeOtherDimensionCSS + "px";
             this._mainElement.style.height = this._totalSizeOtherDimensionCSS + "px";
         } else {
             this._sidebarElement.style.height = sidebarSizeValue;
@@ skipping 424 matching lines @@
         this._showHideSidebarButton.classList.toggle("toggled-hide", !sidebarHidden);
         this._showHideSidebarButton.classList.toggle("top-sidebar-show-hide-button", !this.isVertical() && !this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("right-sidebar-show-hide-button", this.isVertical() && this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("bottom-sidebar-show-hide-button", !this.isVertical() && this.isSidebarSecond());
         this._showHideSidebarButton.classList.toggle("left-sidebar-show-hide-button", this.isVertical() && !this.isSidebarSecond());
         this._showHideSidebarButton.title = sidebarHidden ? WebInspector.UIString("Show %s", this._showHideSidebarButtonTitle) : WebInspector.UIString("Hide %s", this._showHideSidebarButtonTitle);
     },
 
     __proto__: WebInspector.Widget.prototype
 }