Always add 100P scale format in the supported format list.

ui/gfx/image/image_ios.mm

Index: ui/gfx/image/image_ios.mm
diff --git a/ui/gfx/image/image_ios.mm b/ui/gfx/image/image_ios.mm
index cdc921dddc2df462d296f452faf7059e984ad90d..f844d8811cbb1366377ba300ec1081af838f7696 100644
--- a/ui/gfx/image/image_ios.mm
+++ b/ui/gfx/image/image_ios.mm
@@ -26,14 +26,7 @@ void PNGFromUIImage(UIImage* uiimage, std::vector<unsigned char>* png) {
 }
 
 UIImage* CreateUIImageFromPNG(const std::vector<unsigned char>& png) {
-  // iOS only supports one scale factor.
-  std::vector<ui::ScaleFactor> supported_scale_factors =
-      ui::GetSupportedScaleFactors();
-  DCHECK_EQ(1U, supported_scale_factors.size());
-  if (supported_scale_factors.size() < 1)
-    return nil;
-
-  ui::ScaleFactor scale_factor = supported_scale_factors[0];
+  ui::ScaleFactor scale_factor = ui::GetMaxScaleFactor();
   float scale = ui::GetScaleFactorScale(scale_factor);
 
   NSData* data = [NSData dataWithBytes:&png.front() length:png.size()];