DevTools: [Console] fix search to reveal matched messages

Source/devtools/front_end/ui/ViewportControl.js

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 349 matching lines @@
             // Tolerate 1-pixel error due to double-to-integer rounding errors.
             if (this._cumulativeHeights && Math.abs(this._cachedItemHeight(this._firstVisibleIndex + i) - this._provider.fastHeight(i + this._firstVisibleIndex)) > 1)
                 delete this._cumulativeHeights;
         }
         this._rebuildCumulativeHeightsIfNeeded();
         if (shouldStickToBottom) {
             this._lastVisibleIndex = itemCount - 1;
             this._firstVisibleIndex = Math.max(Array.prototype.lowerBound.call(this._cumulativeHeights, this._cumulativeHeights[this._cumulativeHeights.length - 1] - clientHeight), 0);
         } else {
             this._firstVisibleIndex = Math.max(Array.prototype.lowerBound.call(this._cumulativeHeights, visibleFrom), 0);
-            this._lastVisibleIndex = Math.min(Array.prototype.upperBound.call(this._cumulativeHeights, visibleFrom + clientHeight), itemCount - 1);
+            this._lastVisibleIndex = Math.min(Array.prototype.upperBound.call(this._cumulativeHeights, visibleFrom + clientHeight - 1), itemCount - 1);
         }
         var topGapHeight = this._cumulativeHeights[this._firstVisibleIndex - 1] || 0;
         var bottomGapHeight = this._cumulativeHeights[this._cumulativeHeights.length - 1] - this._cumulativeHeights[this._lastVisibleIndex];
 
         this._topGapElement.style.height = topGapHeight + "px";
         this._bottomGapElement.style.height = bottomGapHeight + "px";
         this._topGapElement._active = !!topGapHeight;
         this._bottomGapElement._active = !!bottomGapHeight;
 
         this._contentElement.style.setProperty("height", "10000000px");
@@ skipping 110 matching lines @@
     /**
      * @param {number} index
      * @param {boolean=} makeLast
      */
     scrollItemIntoView: function(index, makeLast)
     {
         if (index > this._firstVisibleIndex && index < this._lastVisibleIndex)
             return;
         if (makeLast)
             this.forceScrollItemToBeLast(index);
-        else
+        else if (index <= this._firstVisibleIndex)
             this.forceScrollItemToBeFirst(index);
+        else if (index >= this._lastVisibleIndex)
+            this.forceScrollItemToBeLast(index);
     },
 
     /**
      * @param {number} index
      */
     forceScrollItemToBeFirst: function(index)
     {
         this._rebuildCumulativeHeightsIfNeeded();
         this.element.scrollTop = index > 0 ? this._cumulativeHeights[index - 1] : 0;
     },
 
     /**
      * @param {number} index
      */
     forceScrollItemToBeLast: function(index)
     {
         this._rebuildCumulativeHeightsIfNeeded();
         this.element.scrollTop = this._cumulativeHeights[index] - this.element.clientHeight;
     }
 }