Add unittest for ArcNotificationContentView

ui/arc/test/run_all_unittests.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // 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 {
 
 class UiArcTestSuite : public base::TestSuite {
  public:
   UiArcTestSuite(int argc, char** argv) : base::TestSuite(argc, argv) {}
 
  protected:
   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:
   DISALLOW_COPY_AND_ASSIGN(UiArcTestSuite);
 };
 
 }  // namespace
 
 int main(int argc, char** argv) {
   UiArcTestSuite test_suite(argc, argv);
 
   mojo::edk::Init();
   return base::LaunchUnitTests(
       argc, argv,
       base::Bind(&UiArcTestSuite::Run, base::Unretained(&test_suite)));
 }