Revert "Revert 137734 - Select theme resources from ResourceBundle at requested scale factor."

ui/base/layout.cc

Index: ui/base/layout.cc
diff --git a/ui/base/layout.cc b/ui/base/layout.cc
index fffa271a18eac5fb272e2b5dc59b5562479ddfd6..9e6be4031874c0ab3fb129ee163db44c26dfe73f 100644
--- a/ui/base/layout.cc
+++ b/ui/base/layout.cc
@@ -20,6 +20,7 @@
 #endif  // defined(OS_WIN)
 
 namespace {
+
 // Helper function that determines whether we want to optimize the UI for touch.
 bool UseTouchOptimizedUI() {
   // If --touch-optimized-ui is specified and not set to "auto", then override
@@ -54,6 +55,9 @@ bool UseTouchOptimizedUI() {
   return false;
 #endif
 }
+
+const float kScaleFactorScales[] = {1.0, 2.0};
+
 }
 
 namespace ui {
@@ -75,4 +79,8 @@ DisplayLayout GetDisplayLayout() {
 #endif
 }
 
+float GetScaleFactorScale(ScaleFactor scale_factor) {
+  return kScaleFactorScales[scale_factor];
+}
+
 }  // namespace ui