Created a new BrowserMessageFilter to handle print related IPC messages.

chrome/browser/renderer_host/browser_render_process_host.cc

Index: chrome/browser/renderer_host/browser_render_process_host.cc
diff --git a/chrome/browser/renderer_host/browser_render_process_host.cc b/chrome/browser/renderer_host/browser_render_process_host.cc
index e78dcf959dd459b3f1b52a976b355b7d1fc7c768..ca62dd48ce03af7b76a2fa2489b3133f593c8626 100644
--- a/chrome/browser/renderer_host/browser_render_process_host.cc
+++ b/chrome/browser/renderer_host/browser_render_process_host.cc
@@ -41,6 +41,7 @@
 #include "chrome/browser/io_thread.h"
 #include "chrome/browser/metrics/user_metrics.h"
 #include "chrome/browser/platform_util.h"
+#include "chrome/browser/printing/printing_message_filter.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/web_cache_manager.h"
 #include "chrome/browser/safe_browsing/client_side_detection_service.h"
@@ -458,6 +459,7 @@ void BrowserRenderProcessHost::CreateMessageFilters() {
   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()));