Fixed a crash scrolls bug.

components/crash/core/browser/resources/crashes.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.
 
 /* Id for tracking automatic refresh of crash list.  */
 var refreshCrashListId = undefined;
 
 /**
  * Requests the list of crashes from the backend.
  */
@@ skipping 15 matching lines @@
     crashes, version, os) {
   $('countBanner').textContent =
       loadTimeData.getStringF('crashCountFormat',
                               crashes.length.toLocaleString());
 
   var crashSection = $('crashList');
 
   $('disabledMode').hidden = enabled;
   $('crashUploadStatus').hidden = !enabled || !dynamicBackend;
 
+  // Make the height fixed while clearing the
+  // element in order to maintain scroll position.
+  crashSection.style.height = getComputedStyle(crashSection).height;
   // Clear any previous list.
   crashSection.textContent = '';
 
   var productName = loadTimeData.getString('shortProductName');
 
   for (var i = 0; i < crashes.length; i++) {
     var crash = crashes[i];
     if (crash.local_id == '')
       crash.local_id = productName;
 
@@ skipping 88 matching lines @@
         link.onclick = function() {
           chrome.send('requestSingleCrashUpload', [this.local_id]);
         };
         uploadNowLinkBlock.appendChild(link);
         crashBlock.appendChild(uploadNowLinkBlock);
       }
     }
     crashSection.appendChild(crashBlock);
   }
 
+  // Reset the height, in order to accommodate for the new content.
+  crashSection.style.height = "";
   $('noCrashes').hidden = crashes.length != 0;
 }
 
 /**
  * Request crashes get uploaded in the background.
  */
 function requestCrashUpload() {
   // Don't need locking with this call because the system crash reporter
   // has locking built into itself.
   chrome.send('requestCrashUpload');
 
   // Trigger a refresh in 5 seconds.  Clear any previous requests.
   clearTimeout(refreshCrashListId);
   refreshCrashListId = setTimeout(requestCrashes, 5000);
 }
 
 document.addEventListener('DOMContentLoaded', function() {
   $('uploadCrashes').onclick = requestCrashUpload;
   requestCrashes();
 });