DevTools: Simplify firstFrameAfterCommit.

Source/devtools/front_end/components_lazy/FilmStripModel.js

 /*
  * Copyright 2015 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.
  */
 
 /**
  * @constructor
  * @param {!WebInspector.TracingModel} tracingModel
  */
@@ skipping 36 matching lines @@
      */
     zeroTime: function()
     {
         return this._tracingModel.minimumRecordTime();
     },
 
     /**
      * @param {number} timestamp
      * @return {?WebInspector.FilmStripModel.Frame}
      */
-    firstFrameAfterCommit: function(timestamp)
+    frameByTimestamp: function(timestamp)
     {
-        var bestIndex = 0;
-        var bestDelta = Number.MAX_VALUE;
-        for (var i = 0; i < this._frames.length; ++i) {
-            var delta = this._frames[i].timestamp - timestamp;
-            if (delta < 0)
-                continue;
-            if (delta < bestDelta) {
-                bestIndex = i;
-                bestDelta = delta;
-            }
+        /**
+         * @param {number} timestamp
+         * @param {!WebInspector.FilmStripModel.Frame} frame
+         * @return {number}
+         */
+        function comparator(timestamp, frame)
+        {
+            return timestamp - frame.timestamp;
         }
-        return bestDelta < 10 ? this._frames[bestIndex] : null;
+        var index = this._frames.upperBound(timestamp, comparator) - 1;

[yurys, 2015/06/09 13:22:36]

lowerBound?

[alph, 2015/06/09 13:26:38]

Done.

+        return index >= 0 ? this._frames[index] : null;
     }
 }
 
 /**
  * @constructor
  * @param {!WebInspector.FilmStripModel} model
  * @param {string} imageData
  * @param {number} timestamp
  * @param {number} index
  */
 WebInspector.FilmStripModel.Frame = function(model, imageData, timestamp, index)
 {
     this._model = model;
     this.imageData = imageData;
     this.timestamp = timestamp;
     this.index = index;
 }
 
 WebInspector.FilmStripModel.Frame.prototype = {
     /**
      * @return {!WebInspector.FilmStripModel}
      */
     model: function()
     {
         return this._model;
     }
 }