Update AuraInit to handle failed initialization

ui/views/mus/aura_init.cc

Index: ui/views/mus/aura_init.cc
diff --git a/ui/views/mus/aura_init.cc b/ui/views/mus/aura_init.cc
index f53872d8e653eea1e95c19743d08d782275a6a2b..286e0eaa96e51fc98ffb8072bcf5fcfe5371d131 100644
--- a/ui/views/mus/aura_init.cc
+++ b/ui/views/mus/aura_init.cc
@@ -52,27 +52,41 @@ class MusViewsDelegate : public ViewsDelegate {
 
 }  // namespace
 
-AuraInit::AuraInit(service_manager::Connector* connector,
-                   const service_manager::Identity& identity,
-                   const std::string& resource_file,
-                   const std::string& resource_file_200,
-                   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-                   Mode mode)
-    : resource_file_(resource_file),
-      resource_file_200_(resource_file_200),
-      env_(aura::Env::CreateInstance(
-          (mode == Mode::AURA_MUS || mode == Mode::AURA_MUS_WINDOW_MANAGER)
-              ? aura::Env::Mode::MUS
-              : aura::Env::Mode::LOCAL)) {
+AuraInit::AuraInit() {
   if (!ViewsDelegate::GetInstance())
     views_delegate_ = base::MakeUnique<MusViewsDelegate>();
+}
+
+AuraInit::~AuraInit() {
+#if defined(OS_LINUX)
+  if (font_loader_.get()) {
+    SkFontConfigInterface::SetGlobal(nullptr);
+    // FontLoader is ref counted. We need to explicitly shutdown the background
+    // thread, otherwise the background thread may be shutdown after the app is
+    // torn down, when we're in a bad state.
+    font_loader_->Shutdown();
+  }
+#endif
+}
+
+bool AuraInit::Init(service_manager::Connector* connector,
+                    const service_manager::Identity& identity,
+                    const std::string& resource_file,
+                    const std::string& resource_file_200,
+                    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
+                    Mode mode) {
+  env_ = aura::Env::CreateInstance(
+      (mode == Mode::AURA_MUS || mode == Mode::AURA_MUS_WINDOW_MANAGER)
+          ? aura::Env::Mode::MUS
+          : aura::Env::Mode::LOCAL);
+
   if (mode == Mode::AURA_MUS) {
     mus_client_ =
         base::WrapUnique(new MusClient(connector, identity, io_task_runner));
   }
   ui::MaterialDesignController::Initialize();
-  if (!InitializeResources(connector))
-    return;
+  if (!InitializeResources(connector, resource_file, resource_file_200))
+    return false;
 
 // Initialize the skia font code to go ask fontconfig underneath.
 #if defined(OS_LINUX)
@@ -85,30 +99,20 @@ AuraInit::AuraInit(service_manager::Connector* connector,
   gfx::Font();
 
   ui::InitializeInputMethodForTesting();
-  initialized_ = true;
-}
-
-AuraInit::~AuraInit() {
-#if defined(OS_LINUX)
-  if (font_loader_.get()) {
-    SkFontConfigInterface::SetGlobal(nullptr);
-    // FontLoader is ref counted. We need to explicitly shutdown the background
-    // thread, otherwise the background thread may be shutdown after the app is
-    // torn down, when we're in a bad state.
-    font_loader_->Shutdown();
-  }
-#endif
+  return true;
 }
 
-bool AuraInit::InitializeResources(service_manager::Connector* connector) {
+bool AuraInit::InitializeResources(service_manager::Connector* connector,
+                                   const std::string& resource_file,
+                                   const std::string& resource_file_200) {
   // Resources may have already been initialized (e.g. when 'chrome --mash' is
   // used to launch the current app).
   if (ui::ResourceBundle::HasSharedInstance())
     return false;
 
-  std::set<std::string> resource_paths({resource_file_});
-  if (!resource_file_200_.empty())
-    resource_paths.insert(resource_file_200_);
+  std::set<std::string> resource_paths({resource_file});
+  if (!resource_file_200.empty())
+    resource_paths.insert(resource_file_200);
 
   catalog::ResourceLoader loader;
   filesystem::mojom::DirectoryPtr directory;
@@ -123,15 +127,15 @@ bool AuraInit::InitializeResources(service_manager::Connector* connector) {
   if (!loader.OpenFiles(std::move(directory), resource_paths))
     return false;
   ui::RegisterPathProvider();
-  base::File pak_file = loader.TakeFile(resource_file_);
+  base::File pak_file = loader.TakeFile(resource_file);
   base::File pak_file_2 = pak_file.Duplicate();
   ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(
       std::move(pak_file), base::MemoryMappedFile::Region::kWholeFile);
   ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
       std::move(pak_file_2), ui::SCALE_FACTOR_100P);
-  if (!resource_file_200_.empty())
+  if (!resource_file_200.empty())
     ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
-        loader.TakeFile(resource_file_200_), ui::SCALE_FACTOR_200P);
+        loader.TakeFile(resource_file_200), ui::SCALE_FACTOR_200P);
   return true;
 }