Add scale factor tag to data packs

ui/base/resource/resource_bundle_linux.cc

Index: ui/base/resource/resource_bundle_linux.cc
diff --git a/ui/base/resource/resource_bundle_linux.cc b/ui/base/resource/resource_bundle_linux.cc
index 5c8d598d71d6e0a1bf1b5f27d103253966d0a03d..90e64399839723fe4b44a603158d27e370524960 100644
--- a/ui/base/resource/resource_bundle_linux.cc
+++ b/ui/base/resource/resource_bundle_linux.cc
@@ -5,6 +5,7 @@
 #include "ui/base/resource/resource_bundle.h"
 
 #include "base/path_service.h"
+#include "ui/base/resource/resource_handle.h"
 #include "ui/base/ui_base_paths.h"
 
 namespace {
@@ -21,9 +22,19 @@ FilePath GetResourcesPakFilePath(const std::string& pak_name) {
 namespace ui {
 
 void ResourceBundle::LoadCommonResources() {
-  AddDataPack(GetResourcesPakFilePath("chrome.pak"));
-  AddDataPack(GetResourcesPakFilePath("theme_resources_standard.pak"));
-  AddDataPack(GetResourcesPakFilePath("ui_resources_standard.pak"));
+  AddDataPack(GetResourcesPakFilePath("chrome.pak"),
+              ResourceHandle::kScaleFactor1x);
+  AddDataPack(GetResourcesPakFilePath("theme_resources_standard.pak"),
+              ResourceHandle::kScaleFactor1x);
+  AddDataPack(GetResourcesPakFilePath("ui_resources_standard.pak"),
+              ResourceHandle::kScaleFactor1x);
+
+#if defined(ENABLE_HIDPI)
+  AddDataPack(GetResourcesPakFilePath("theme_resources_2x.pak"),
+              ResourceHandle::kScaleFactor2x);
+  AddDataPack(GetResourcesPakFilePath("ui_resources_2x.pak"),
+              ResourceHandle::kScaleFactor2x);
+#endif
 }
 
 }  // namespace ui