ui/base/cocoa: Change auto to not deduce raw pointers.

ui/base/cocoa/nscolor_additions.mm

Index: ui/base/cocoa/nscolor_additions.mm
diff --git a/ui/base/cocoa/nscolor_additions.mm b/ui/base/cocoa/nscolor_additions.mm
index 3e1a94b5e5614d3427f7c508a23150a627659e18..84502d6d33be642a348efedb798c3f7315078154 100644
--- a/ui/base/cocoa/nscolor_additions.mm
+++ b/ui/base/cocoa/nscolor_additions.mm
@@ -20,8 +20,8 @@
   const NSInteger numberOfComponents = [self numberOfComponents];
   std::vector<CGFloat> components(numberOfComponents, 0.0);
   [self getComponents:components.data()];
-  auto color = CGColorCreate([[self colorSpace] CGColorSpace],
-                             components.data());
+  auto* color =
+      CGColorCreate([[self colorSpace] CGColorSpace], components.data());
   base::mac::CFTypeRefToNSObjectAutorelease(color);
   return color;
 }