Cancel prerenders for pages that call window.print()

chrome/browser/chrome_content_browser_client.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/chrome_content_browser_client.h"
 
 #include "base/command_line.h"
 #include "chrome/app/breakpad_mac.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/character_encoding.h"
 #include "chrome/browser/chrome_worker_message_filter.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/debugger/devtools_handler.h"
 #include "chrome/browser/desktop_notification_handler.h"
 #include "chrome/browser/extensions/extension_message_handler.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prerender/prerender_message_filter.h"
 #include "chrome/browser/printing/printing_message_filter.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/chrome_render_message_filter.h"
 #include "chrome/browser/renderer_host/chrome_render_view_host_observer.h"
 #include "chrome/browser/renderer_host/text_input_client_message_filter.h"
 #include "chrome/browser/search_engines/search_provider_install_state_message_filter.h"
 #include "chrome/browser/spellcheck_message_filter.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_factory.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 40 matching lines @@
     }
   }
 }
 
 void ChromeContentBrowserClient::BrowserRenderProcessHostCreated(
     BrowserRenderProcessHost* host) {
   int id = host->id();
   Profile* profile = host->profile();
   host->channel()->AddFilter(new ChromeRenderMessageFilter(
       id, profile, profile->GetRequestContextForRenderProcess(id)));
+  host->channel()->AddFilter(new prerender::PrerenderMessageFilter(

[cbentzel, 2011/05/13 12:00:28]

Does ordering of filters matter? I'm guessing it does in this case, where you
want the prerendermessagefilter to intercept the printing IPCs before
PrintingMessageFilter does.

If so, please comment on the ordering dependency.

[dominich, 2011/05/13 15:05:33]

Done.

+      host, profile->GetPrerenderManager()));
   host->channel()->AddFilter(new PrintingMessageFilter());
   host->channel()->AddFilter(
       new SearchProviderInstallStateMessageFilter(id, profile));
   host->channel()->AddFilter(new SpellCheckMessageFilter(id));
 #if defined(OS_MACOSX)
   host->channel()->AddFilter(new TextInputClientMessageFilter(host->id()));
 #endif
 }
 
 void ChromeContentBrowserClient::WorkerProcessHostCreated(
@@ skipping 192 matching lines @@
     return PpapiCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   if (process_type == switches::kGpuProcess)
     return GpuCrashHandlerHostLinux::GetInstance()->GetDeathSignalSocket();
 
   return -1;
 }
 #endif
 
 }  // namespace chrome