Initialize the message center as part of the testing browser process

ash/test/test_suite.cc

Index: ash/test/test_suite.cc
diff --git a/ash/test/test_suite.cc b/ash/test/test_suite.cc
index 3fde2c6de7267236bdcf471bc54aa64c96ffaa08..c775d2b96c761790f0f05fcc570b3082bec45f34 100644
--- a/ash/test/test_suite.cc
+++ b/ash/test/test_suite.cc
@@ -16,6 +16,7 @@
 #include "ui/base/ui_base_paths.h"
 #include "ui/gfx/gfx_paths.h"
 #include "ui/gl/test/gl_surface_test_support.h"
+#include "ui/message_center/message_center.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
@@ -33,6 +34,7 @@ AuraShellTestSuite::~AuraShellTestSuite() {}
 void AuraShellTestSuite::Initialize() {
   base::TestSuite::Initialize();
   gl::GLSurfaceTestSupport::InitializeOneOff();
+  message_center::MessageCenter::Initialize();
 
 #if defined(OS_WIN)
   com_initializer_.reset(new base::win::ScopedCOMInitializer());
@@ -76,6 +78,7 @@ void AuraShellTestSuite::Shutdown() {
 #if defined(OS_WIN)
   com_initializer_.reset();
 #endif
+  message_center::MessageCenter::Shutdown();
   base::TestSuite::Shutdown();
 }