Created a new BrowserMessageFilter to handle print related IPC messages.

chrome/browser/renderer_host/browser_render_process_host.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "chrome/browser/renderer_host/browser_render_process_host.h"
 
 #include <algorithm>
@@ skipping 30 matching lines @@
 #include "chrome/browser/geolocation/geolocation_dispatcher_host.h"
 #include "chrome/browser/gpu_process_host.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/in_process_webkit/dom_storage_message_filter.h"
 #include "chrome/browser/in_process_webkit/indexed_db_dispatcher_host.h"
 #include "chrome/browser/io_thread.h"
 #include "chrome/browser/metrics/user_metrics.h"
 #include "chrome/browser/mime_registry_message_filter.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/plugin_service.h"
+#include "chrome/browser/printing/printing_message_filter.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/audio_renderer_host.h"
 #include "chrome/browser/renderer_host/blob_message_filter.h"
 #include "chrome/browser/renderer_host/database_message_filter.h"
 #include "chrome/browser/renderer_host/file_utilities_message_filter.h"
 #include "chrome/browser/renderer_host/gpu_message_filter.h"
 #include "chrome/browser/renderer_host/pepper_file_message_filter.h"
 #include "chrome/browser/renderer_host/pepper_message_filter.h"
 #include "chrome/browser/renderer_host/render_message_filter.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
@@ skipping 390 matching lines @@
   channel_->AddFilter(
       new AppCacheDispatcherHost(profile()->GetRequestContext(), id()));
   channel_->AddFilter(new DOMStorageMessageFilter(id(), profile()));
   channel_->AddFilter(new IndexedDBDispatcherHost(id(), profile()));
   channel_->AddFilter(
       GeolocationDispatcherHost::New(
           id(), profile()->GetGeolocationPermissionContext()));
   channel_->AddFilter(new GpuMessageFilter(id()));
   channel_->AddFilter(new PepperFileMessageFilter(id(), profile()));
   channel_->AddFilter(new PepperMessageFilter(profile()));
+  channel_->AddFilter(new PrintingMessageFilter());
   channel_->AddFilter(new speech_input::SpeechInputDispatcherHost(id()));
   channel_->AddFilter(
       new SearchProviderInstallStateMessageFilter(id(), profile()));
   channel_->AddFilter(new FileSystemDispatcherHost(profile()));
   channel_->AddFilter(new device_orientation::MessageFilter());
   channel_->AddFilter(
       new BlobMessageFilter(id(), profile()->GetBlobStorageContext()));
   channel_->AddFilter(new FileUtilitiesMessageFilter(id()));
   channel_->AddFilter(new MimeRegistryMessageFilter());
   channel_->AddFilter(new DatabaseMessageFilter(
@@ skipping 809 matching lines @@
     IPC::PlatformFileForTransit file;
 #if defined(OS_POSIX)
     file = base::FileDescriptor(model_file, false);
 #elif defined(OS_WIN)
     ::DuplicateHandle(::GetCurrentProcess(), model_file, GetHandle(), &file, 0,
                       false, DUPLICATE_SAME_ACCESS);
 #endif
     Send(new ViewMsg_SetPhishingModel(file));
   }
 }