Add unittest for ArcNotificationContentView

ui/arc/test/run_all_unittests.cc

Index: ui/arc/test/run_all_unittests.cc
diff --git a/ui/arc/test/run_all_unittests.cc b/ui/arc/test/run_all_unittests.cc
index d9558ea09eb5d0b002173c6acdfb0e4db5dc362f..db674b81daa3f9856a943f385a9bd2bd1d29ca4f 100644
--- a/ui/arc/test/run_all_unittests.cc
+++ b/ui/arc/test/run_all_unittests.cc
@@ -3,9 +3,13 @@
 // found in the LICENSE file.
 
 #include "base/bind.h"
+#include "base/path_service.h"
 #include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_discardable_memory_allocator.h"
 #include "base/test/test_suite.h"
 #include "mojo/edk/embedder/embedder.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/base/ui_base_paths.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 
 namespace {
@@ -18,6 +22,17 @@ class UiArcTestSuite : public base::TestSuite {
   void Initialize() override {
     base::TestSuite::Initialize();
     gl::GLSurfaceTestSupport::InitializeOneOff();
+
+    // To use resource bundles
+    ui::RegisterPathProvider();
+    base::FilePath ui_test_pak_path;
+    ASSERT_TRUE(PathService::Get(ui::UI_TEST_PAK, &ui_test_pak_path));
+    ui::ResourceBundle::InitSharedInstanceWithPakPath(ui_test_pak_path);
+  }
+
+  void Shutdown() override {
+    ui::ResourceBundle::CleanupSharedInstance();
+    base::TestSuite::Shutdown();
   }
 
  private: