Make about:net-internal's filters work a bit better.

chrome/browser/resources/net_internals/log_view_painter.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.
 
 // TODO(eroman): put these methods into a namespace.
 
 var printLogEntriesAsText;
+var searchLogEntriesForText;
 var proxySettingsToString;
 var stripCookiesAndLoginInfo;
 
 // Start of anonymous namespace.
 (function() {
 'use strict';
 
 function canCollapseBeginWithEnd(beginEntry) {
   return beginEntry &&
          beginEntry.isBegin() &&
          beginEntry.end &&
          beginEntry.end.index == beginEntry.index + 1 &&
          (!beginEntry.orig.params || !beginEntry.end.orig.params);
 }
 
 /**
  * Adds a child pre element to the end of |parent|, and writes the
  * formatted contents of |logEntries| to it.
  */
 printLogEntriesAsText = function(logEntries, parent, privacyStripping,
                                  logCreationTime) {
+  var tablePrinter = createTablePrinter(logEntries, privacyStripping,
+                                        logCreationTime);
+
+  // Format the table for fixed-width text.
+  tablePrinter.toText(0, parent);
+}
+
+/**
+ * Searches the table that would be output by printLogEntriesAsText for
+ * |searchString|.  Returns true if |searchString| would appear entirely within
+ * any field in the table.  |searchString| must be lowercase.
+ *
+ * Seperate function from printLogEntriesAsText since TablePrinter.toText
+ * modifies the DOM.
+ */
+searchLogEntriesForText = function(searchString, logEntries, privacyStripping) {
+  var tablePrinter =
+      createTablePrinter(logEntries, privacyStripping, undefined);
+
+  // Format the table for fixed-width text.
+  return tablePrinter.search(searchString);
+}
+
+/**
+ * Creates a TablePrinter for use by the above two functions.
+ */
+function createTablePrinter(logEntries, privacyStripping, logCreationTime) {
   var entries = LogGroupEntry.createArrayFrom(logEntries);
   var tablePrinter = new TablePrinter();
   var parameterOutputter = new ParameterOutputter(tablePrinter);
 
   if (entries.length == 0)
-    return;
+    return tablePrinter;
 
   var startTime = timeutil.convertTimeTicksToTime(entries[0].orig.time);
 
   for (var i = 0; i < entries.length; ++i) {
     var entry = entries[i];
 
     // Avoid printing the END for a BEGIN that was immediately before, unless
     // both have extra parameters.
     if (!entry.isEnd() || !canCollapseBeginWithEnd(entry.begin)) {
       var entryTime = timeutil.convertTimeTicksToTime(entry.orig.time);
@@ skipping 29 matching lines @@
     }
   }
 
   // If viewing a saved log file, add row with just the time the log was
   // created, if the event never completed.
   if (logCreationTime != undefined &&
       entries[entries.length - 1].getDepth() > 0) {
     addRowWithTime(tablePrinter, logCreationTime, startTime);
   }
 
-  // Format the table for fixed-width text.
-  tablePrinter.toText(0, parent);
+  return tablePrinter;
 }
 
 /**
  * Adds a new row to the given TablePrinter, and adds five cells containing
  * information about the time an event occured.
  * Format is '[t=<UTC time in ms>] [st=<ms since the source started>]'.
  * @param {TablePrinter} tablePrinter The table printer to add the cells to.
  * @param {number} eventTime The time the event occured, as a UTC time in
  *     milliseconds.
  * @param {number} startTime The time the first event for the source occured,
@@ skipping 567 matching lines @@
 
   if (config.source != undefined && config.source != 'UNKNOWN')
     result.push('Source: ' + config.source);
 
   return result.join('\n');
 };
 
 // End of anonymous namespace.
 })();