Updating the Chromium reference build on Linux. The continuous build...

chrome/tools/test/reference_build/chrome_linux/resources/bookmark_manager/css/bmm.css.js

+// Copyright (c) 2010 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.
+
+// Create the drop down arrow for the drop down buttons.
+(function() {
+  var ctx = document.getCSSCanvasContext('2d', 'drop-down-arrow', 9, 4);
+  ctx.fillStyle = '#000';
+  ctx.translate(1.5, .5);
+  ctx.beginPath();
+  ctx.moveTo(0, 0);
+  ctx.lineTo(6, 0);
+  ctx.lineTo(3, 3);
+  ctx.closePath();
+  ctx.fill();
+  ctx.stroke();
+})();