Change name of NativeTheme::instance() to make it clear it's web only.

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

Index: chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
diff --git a/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm b/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
index 077877456f318d85668b8aa990edc949f4e55bad..f71dc801c239f461dce5d91ce40776edced3a8cf 100644
--- a/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
+++ b/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
@@ -72,6 +72,7 @@
 #include "ui/gfx/text_elider.h"
 #include "ui/native_theme/common_theme.h"
 #include "ui/native_theme/native_theme.h"
+#include "ui/native_theme/native_theme_mac.h"
 
 namespace {
 
@@ -198,7 +199,7 @@ NSTextView* BuildFixedWidthTextViewWithLink(
 // Returns the native dialog background color.
 NSColor* GetDialogBackgroundColor() {
   return gfx::SkColorToCalibratedNSColor(
-      ui::NativeTheme::instance()->GetSystemColor(
+      ui::NativeThemeMac::instance()->GetSystemColor(
           ui::NativeTheme::kColorId_DialogBackground));
 }