Add 2x icons resources to mash.

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 26eb071349fcc23b55971698c4647d9e7620fda0..2d0981b9e1aaafa8790fadb890dec96ee9362e78 100644
--- a/ui/views/mus/aura_init.cc
+++ b/ui/views/mus/aura_init.cc
@@ -27,12 +27,6 @@ namespace views {
 
 namespace {
 
-std::set<std::string> GetResourcePaths(const std::string& resource_file) {
-  std::set<std::string> paths;
-  paths.insert(resource_file);
-  return paths;
-}
-
 class MusViewsDelegate : public ViewsDelegate {
  public:
   MusViewsDelegate() {}
@@ -52,8 +46,10 @@ class MusViewsDelegate : public ViewsDelegate {
 }  // namespace
 
 AuraInit::AuraInit(shell::Connector* connector,
-                   const std::string& resource_file)
+                   const std::string& resource_file,
+                   const std::string& resource_file_200)
     : resource_file_(resource_file),
+      resource_file_200_(resource_file_200),
       env_(aura::Env::CreateInstance()),
       views_delegate_(new MusViewsDelegate) {
   ui::MaterialDesignController::Initialize();
@@ -77,11 +73,15 @@ AuraInit::~AuraInit() {
 void AuraInit::InitializeResources(shell::Connector* connector) {
   if (ui::ResourceBundle::HasSharedInstance())
     return;
+
+  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;
   connector->ConnectToInterface("mojo:catalog", &directory);
-  CHECK(loader.OpenFiles(std::move(directory),
-        GetResourcePaths(resource_file_)));
+  CHECK(loader.OpenFiles(std::move(directory), resource_paths));
   ui::RegisterPathProvider();
   base::File pak_file = loader.TakeFile(resource_file_);
   base::File pak_file_2 = pak_file.Duplicate();
@@ -89,6 +89,9 @@ void AuraInit::InitializeResources(shell::Connector* connector) {
       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())
+    ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
+        loader.TakeFile(resource_file_200_), ui::SCALE_FACTOR_200P);
 
 // Initialize the skia font code to go ask fontconfig underneath.
 #if defined(OS_LINUX)