GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/allocator/allocator_shim.cc

Index: base/allocator/allocator_shim.cc
diff --git a/base/allocator/allocator_shim.cc b/base/allocator/allocator_shim.cc
index 36736cdc78d79105718b3f0790f843dc3dd63a76..fc391b0bbe429301d2fd99ca325e3534f50f68ce 100644
--- a/base/allocator/allocator_shim.cc
+++ b/base/allocator/allocator_shim.cc
@@ -292,10 +292,12 @@ ALWAYS_INLINE void ShimFreeDefiniteSize(void* ptr, size_t size, void* context) {
 
 }  // extern "C"
 
-#if !defined(OS_WIN) && !defined(OS_MACOSX)
+#if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(OS_AIX)
 // Cpp symbols (new / delete) should always be routed through the shim layer
 // except on Windows and macOS where the malloc intercept is deep enough that it
 // also catches the cpp calls.
+// This currently can't be done on AIX based on how
+// allocator_shim_default_dispatch_to_glibc.cc is set up.
 #include "base/allocator/allocator_shim_override_cpp_symbols.h"
 #endif