allocator/Windows: delete the old non-unified allocator-shim

media/base/media.cc

Index: media/base/media.cc
diff --git a/media/base/media.cc b/media/base/media.cc
index 82cff856b7d2c03a3aade3075130f8918f42d626..e058b6a15dcf2ce3721f4bbd3778aacf520ce685 100644
--- a/media/base/media.cc
+++ b/media/base/media.cc
@@ -4,6 +4,7 @@
 
 #include "media/base/media.h"
 
+#include "base/allocator/features.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
@@ -39,10 +40,10 @@ class MediaInitializer {
     // Disable logging as it interferes with layout tests.
     av_log_set_level(AV_LOG_QUIET);
 
-#if defined(ALLOCATOR_SHIM)
+#if BUILDFLAG(USE_ALLOCATOR_SHIM)
     // Remove allocation limit from ffmpeg, so calls go down to shim layer.
     av_max_alloc(0);
-#endif  // defined(ALLOCATOR_SHIM)
+#endif  // BUILDFLAG(USE_ALLOCATOR_SHIM)
 
 #endif  // !defined(MEDIA_DISABLE_FFMPEG)
   }