WebUI TaskManager: Use the specified height of row on refleshing.

chrome/browser/resources/task_manager/main.js

 // Copyright (c) 2012 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 */
 function TaskManager() { }
 
 cr.addSingletonGetter(TaskManager);
 
 /**
@@ skipping 19 matching lines @@
     ['processId', 'processIDColumn', 100, false],
     ['webCoreImageCacheSize', 'webcoreImageCacheColumn', 120, false],
     ['webCoreScriptsCacheSize', 'webcoreScriptsCacheColumn', 120, false],
     ['webCoreCSSCacheSize', 'webcoreCSSCacheColumn', 120, false],
     ['fps', 'fpsColumn', 50, true],
     ['sqliteMemoryUsed', 'sqliteMemoryUsedColumn', 80, false],
     ['goatsTeleported', 'goatsTeleportedColumn', 80, false],
     ['v8MemoryAllocatedSize', 'javascriptMemoryAllocatedColumn', 120, false],
 ];
 
+/*
+ * Height of each tasks. It is 20px, which is also defined in CSS.
+ * @const
+ */
+var HEIGHT_OF_TASK = 20;
+
 var COMMAND_CONTEXTMENU_COLUMN_PREFIX = 'columnContextMenu';
 var COMMAND_CONTEXTMENU_TABLE_PREFIX = 'tableContextMenu';
 
 var localStrings = new LocalStrings();
 
 TaskManager.prototype = {
   /**
    * Handle window close.
    */
   onClose: function () {
@@ skipping 475 matching lines @@
       cell.className = 'table-row-cell';
       cell.id = 'column-' + pid + '-' + cm.getId(i);
       cell.appendChild(
           cm.getRenderFunction(i).call(null, data, cm.getId(i), table));
 
       listItem.appendChild(cell);
 
       // Stores the cell element to the dictionary.
       this.elementsCache_[pid].cell[i] = cell;
     }
+
+    // Specifies the height of the row. The height of each row is
+    // 'num_of_tasks * HEIGHT_OF_TASK' px.
+    listItem.style.height = (data['uniqueId'].length * HEIGHT_OF_TASK) + 'px';
+
     listItem.data = data;
 
     // Stores the list item element, the number of columns and the number of
     // childlen.
     this.elementsCache_[pid].listItem = listItem;
     this.elementsCache_[pid].cachedColumnSize = cm.size;
     this.elementsCache_[pid].cachedChildSize = data['uniqueId'].length;
 
     return listItem;
   },
@@ skipping 289 matching lines @@
     return;
   taskmanager.onTaskChange(start, length, tasks);
 }
 
 function taskRemoved(start, length) {
   // Sometimes this can get called too early.
   if (!taskmanager)
     return;
   taskmanager.onTaskRemove(start, length);
 }