Remove HistoryPublisher code.

tools/memory_watcher/scripts/summary.pl

 #!/usr/bin/perl
 # 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.
 #
 # Read a memtrace logfile from stdin and group memory allocations by logical
 # code component. The code component is guessed from the callstack, and
 # is something like {v8, sqlite, disk cache, skia, etc..}
 #
 # Usage:
@@ skipping 96 matching lines @@
     } elsif ($loc =~ m/safe_browsing/) {
       $location_blame = "safe_browsing";
     } elsif ($loc =~ m/VisitedLinkMaster/) {
       $location_blame = "VisitedLinkMaster";
     } elsif ($loc =~ m/NewDOMUI/) {
       $location_blame = "NewDOMUI";
     } elsif ($loc =~ m/RegistryControlledDomainService/) {
       $location_blame = "RegistryControlledDomainService";
     } elsif ($loc =~ m/URLRequestChromeJob::DataAvailable/) {
       $location_blame = "URLRequestChromeJob DataAvailable";
-    } elsif ($loc =~ m/history_publisher/) {
-      $location_blame = "history publisher";
     } else {
       $location_blame = "unknown";
     }
 
     # Surface large outliers in an "interesting" group.
     my $interesting_group = "unknown";
     my $interesting_size = 10000000;  # Make this smaller as needed.
     # TODO(jar): Add this as a pair of shell arguments.
     if ($bytes > $interesting_size && $location_blame eq $interesting_group) {
       # Create a special group for the exact stack that contributed so much.
@@ skipping 18 matching lines @@
 # Insert commas into an integer after each three digits for printing.
 sub comma_print {
     my $num = "$_[0]";
     $num =~ s/(\d{1,3}?)(?=(\d{3})+$)/$1,/g;
     return $num;
 }
 
 # ----- Main ------------------------------------------------
 
 process_stdin();