Use proper namespace in skia/ext

ui/app_list/cocoa/apps_grid_view_item.mm

Index: ui/app_list/cocoa/apps_grid_view_item.mm
diff --git a/ui/app_list/cocoa/apps_grid_view_item.mm b/ui/app_list/cocoa/apps_grid_view_item.mm
index 992bc9a82ebbaa0d85a04f41b98e0b8180589b32..03fbb4637ab6eb9bf385bab9a2127b6d33694f42 100644
--- a/ui/app_list/cocoa/apps_grid_view_item.mm
+++ b/ui/app_list/cocoa/apps_grid_view_item.mm
@@ -173,7 +173,7 @@ void ItemModelObserverBridge::ItemPercentDownloadedChanged() {
   if (!selected_)
     return;
 
-  [gfx::SkColorToSRGBNSColor(app_list::kSelectedColor) set];
+  [skia::SkColorToSRGBNSColor(app_list::kSelectedColor) set];
   NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
 }
 
@@ -243,7 +243,7 @@ void ItemModelObserverBridge::ItemPercentDownloadedChanged() {
                               .GetPrimaryFont()
                               .GetNativeFont(),
     NSForegroundColorAttributeName :
-        gfx::SkColorToSRGBNSColor(app_list::kGridTitleColor)
+        skia::SkColorToSRGBNSColor(app_list::kGridTitleColor)
   };
   NSString* buttonTitle =
       base::SysUTF8ToNSString([self model]->GetDisplayName());