Fix ENABLE_SWIFTSHADER flag.

ui/gl/init/gl_initializer_win.cc

Index: ui/gl/init/gl_initializer_win.cc
diff --git a/ui/gl/init/gl_initializer_win.cc b/ui/gl/init/gl_initializer_win.cc
index d1c3fe9d0d0aab711f816b2777a3f36c3cc986e0..b4b4c7fa2c9abb4de647990e56cb3087067ca421 100644
--- a/ui/gl/init/gl_initializer_win.cc
+++ b/ui/gl/init/gl_initializer_win.cc
@@ -23,6 +23,7 @@
 #include "ui/gl/angle_platform_impl.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_egl_api_implementation.h"
+#include "ui/gl/gl_features.h"
 #include "ui/gl/gl_gl_api_implementation.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
 #include "ui/gl/gl_surface_egl.h"
@@ -139,7 +140,7 @@ bool InitializeStaticEGLInternal() {
     return false;
   }
 
-#if defined(ENABLE_SWIFTSHADER)
+#if BUILDFLAG(ENABLE_SWIFTSHADER)
   if (using_swift_shader) {
     // Register key so that SwiftShader doesn't display watermark logo.
     typedef void (__stdcall *RegisterFunc)(const char* key);