Initialize the message center as part of the testing browser process

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 c07681a7c35e2dcb7402cf75a08bebd8b1bbbb20..113dc2d52b701dc38f364378b37ffef1427cbb08 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -200,6 +200,15 @@ using content::ResourceDispatcherHost;
 BrowserProcessImpl::BrowserProcessImpl(
     base::SequencedTaskRunner* local_state_task_runner,
     const base::CommandLine& command_line)
+    : BrowserProcessImpl::BrowserProcessImpl(
+          local_state_task_runner,
+          command_line,
+          true /* initialize_message_center */) {}
+
+BrowserProcessImpl::BrowserProcessImpl(
+    base::SequencedTaskRunner* local_state_task_runner,
+    const base::CommandLine& command_line,
+    bool initialize_message_center)
     : created_watchdog_thread_(false),
       created_browser_policy_connector_(false),
       created_profile_manager_(false),
@@ -213,7 +222,8 @@ BrowserProcessImpl::BrowserProcessImpl(
       tearing_down_(false),
       download_status_updater_(new DownloadStatusUpdater),
       local_state_task_runner_(local_state_task_runner),
-      cached_default_web_client_state_(shell_integration::UNKNOWN_DEFAULT) {
+      cached_default_web_client_state_(shell_integration::UNKNOWN_DEFAULT),
+      initialize_message_center_(initialize_message_center) {
   g_browser_process = this;
   platform_part_.reset(new BrowserProcessPlatformPart());
 
@@ -251,8 +261,8 @@ BrowserProcessImpl::BrowserProcessImpl(
       new extensions::ChromeExtensionsBrowserClient);
   extensions::ExtensionsBrowserClient::Set(extensions_browser_client_.get());
 #endif
-
-  message_center::MessageCenter::Initialize();
+  if (initialize_message_center_)
+    message_center::MessageCenter::Initialize();
 
   update_client::UpdateQueryParams::SetDelegate(
       ChromeUpdateQueryParamsDelegate::GetInstance());
@@ -335,7 +345,8 @@ void BrowserProcessImpl::StartTearDown() {
   storage_monitor::StorageMonitor::Destroy();
 #endif
 
-  message_center::MessageCenter::Shutdown();
+  if (initialize_message_center_)
+    message_center::MessageCenter::Shutdown();
 
   // The policy providers managed by |browser_policy_connector_| need to shut
   // down while the IO and FILE threads are still alive. The monitoring