Start delegating notifications to MessageCenter on Windows.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index eee6b04af4302511d7e17d5c5a54490a496c8834..eb14c3ea3070f7912fe851d9b2bc75927964323b 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -91,6 +91,10 @@
 #include "chrome/browser/policy/policy_service_stub.h"
 #endif  // defined(ENABLE_CONFIGURATION_POLICY)
 
+#if defined(ENABLE_MESSAGE_CENTER)
+#include "ui/message_center/message_center.h"
+#endif
+
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "ui/views/focus/view_storage.h"
@@ -149,6 +153,7 @@ BrowserProcessImpl::BrowserProcessImpl(
       created_local_state_(false),
       created_icon_manager_(false),
       created_notification_ui_manager_(false),
+      created_message_center_(false),
       created_safe_browsing_service_(false),
       module_ref_count_(0),
       did_start_(false),
@@ -442,6 +447,17 @@ NotificationUIManager* BrowserProcessImpl::notification_ui_manager() {
   return notification_ui_manager_.get();
 }
 
+message_center::MessageCenter* BrowserProcessImpl::message_center() {
+#ifdef ENABLE_MESSAGE_CENTER

[stevenjb, 2013/01/18 19:56:19]

Shouldn't we add && !USE_ASH here, otherwise we'll get two message center
instances?

[Dmitry Titov, 2013/01/18 21:23:00]

Done.

+  DCHECK(CalledOnValidThread());
+  if (!created_message_center_)
+    CreateMessageCenter();
+  return message_center_.get();
+#else
+  return NULL;
+#endif
+}
+
 policy::BrowserPolicyConnector* BrowserProcessImpl::browser_policy_connector() {
   DCHECK(CalledOnValidThread());
 #if defined(ENABLE_CONFIGURATION_POLICY)
@@ -848,6 +864,14 @@ void BrowserProcessImpl::CreateNotificationUIManager() {
 #endif
 }
 
+void BrowserProcessImpl::CreateMessageCenter() {
+#if defined(ENABLE_MESSAGE_CENTER)
+  DCHECK(message_center_.get() == NULL);
+  message_center_.reset(new message_center::MessageCenter());
+  created_message_center_ = true;
+#endif
+}
+
 void BrowserProcessImpl::CreateBackgroundModeManager() {
   DCHECK(background_mode_manager_.get() == NULL);
   background_mode_manager_.reset(