[Mac] Do not initialize the MockCrApplication in base::TestSuite.

ui/message_center/test/run_all_unittests.cc

Index: ui/message_center/test/run_all_unittests.cc
diff --git a/ui/message_center/test/run_all_unittests.cc b/ui/message_center/test/run_all_unittests.cc
index 274b17671059227e9e476c551f215ff90cf24006..3d3606c79708f9fb3433ca05f1cab157bdb243f4 100644
--- a/ui/message_center/test/run_all_unittests.cc
+++ b/ui/message_center/test/run_all_unittests.cc
@@ -14,6 +14,8 @@
 
 #if !defined(OS_MACOSX)
 #include "ui/gl/gl_surface.h"
+#else
+#include "base/test/mock_chrome_application_mac.h"
 #endif
 
 namespace {
@@ -26,6 +28,8 @@ class MessageCenterTestSuite : public base::TestSuite {
   virtual void Initialize() override {
 #if !defined(OS_MACOSX)
     gfx::GLSurface::InitializeOneOffForTests();
+#else
+    mock_cr_app::RegisterMockCrApp();
 #endif
     base::TestSuite::Initialize();
     ui::RegisterPathProvider();