Moving the contents of chrome://gpu Profiling to chrome://tracing.

chrome/browser/resources/tracing/fast_rect_renderer.js

 // Copyright (c) 2011 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.
 
 
 /**
  * @fileoverview Provides a mechanism for drawing massive numbers of
  * colored rectangles into a canvas in an efficient manner, provided
  * they are drawn left to right with fixed y and height throughout.
  *
  * The basic idea used here is to fuse subpixel rectangles together so that
  * we never issue a canvas fillRect for them. It turns out Javascript can
  * do this quite efficiently, compared to asking Canvas2D to do the same.
  *
  * A few extra things are done by this class in the name of speed:
  * - Viewport culling: off-viewport rectangles are discarded.
  *
  * - The actual discarding operation is done in world space,
  *   e.g. pre-transform.
  *
  * - Rather than expending compute cycles trying to figure out an average
  *   color for fused rectangles from css strings, you instead draw using
  *   palletized colors. The fused rect is the max pallete index encountered.
  *
  * Make sure to flush the trackRenderer before finishing drawing in order
  * to commit any queued drawing operations.
  */
-cr.define('gpu', function() {
+cr.define('tracing', function() {
 
   /**
    * Creates a fast rect renderer with a specific set of culling rules
    * and color pallette.
    * @param {GraphicsContext2D} ctx Canvas2D drawing context.
    * @param {number} vpLeft The leftmost visible part of the drawing viewport.
    * @param {number} minRectSize Only rectangles with width < minRectSize are
    *    considered for merging.
    * @param {number} maxMergeDist Controls how many successive small rectangles
    *    can be merged together before issuing a rectangle.
@@ skipping 72 matching lines @@
         this.merging_ = false;
       }
     }
   };
 
   return {
     FastRectRenderer: FastRectRenderer
   };
 
 });