allocator: rename use_experimental_allocator_shim to use_allocator_shim

base/allocator/BUILD.gn

Index: base/allocator/BUILD.gn
diff --git a/base/allocator/BUILD.gn b/base/allocator/BUILD.gn
index 6d5484f0ba87adfc97017a0a50a3b2e73a9b9cbf..6ebbc1163e5c8269f4a4d045ceac500e3dfda3b9 100644
--- a/base/allocator/BUILD.gn
+++ b/base/allocator/BUILD.gn
@@ -16,7 +16,7 @@ declare_args() {
 # The Windows-only allocator shim is only enabled for Release static builds, and
 # is mutually exclusive with the generalized shim.
 win_use_allocator_shim = is_win && !is_component_build && !is_debug &&
-                         !use_experimental_allocator_shim && !is_asan
+                         !use_allocator_shim && !is_asan
 
 # This "allocator" meta-target will forward to the default allocator according
 # to the build settings.
@@ -54,7 +54,7 @@ config("tcmalloc_flags") {
       "TCMALLOC_FOR_DEBUGALLOCATION",
     ]
   }
-  if (use_experimental_allocator_shim) {
+  if (use_allocator_shim) {
     defines += [ "TCMALLOC_DONT_REPLACE_SYSTEM_ALLOC" ]
   }
   if (is_clang) {
@@ -261,7 +261,7 @@ if (use_allocator == "tcmalloc") {
       # //base/allocator/allocator_shim_override_glibc_weak_symbols.h and
       # //base/allocator/allocator_shim_internals.h for the definition of
       # SHIM_ALWAYS_EXPORT).
-      if (!use_experimental_allocator_shim) {
+      if (!use_allocator_shim) {
         configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
         configs += [ "//build/config/gcc:symbol_visibility_default" ]
       }
@@ -292,8 +292,8 @@ if (use_allocator == "tcmalloc") {
 buildflag_header("features") {
   header = "features.h"
   flags = [
-    "USE_EXPERIMENTAL_ALLOCATOR_SHIM=$use_experimental_allocator_shim",
-    "ENABLE_WIN_ALLOCATOR_SHIM_TESTS=($use_experimental_allocator_shim || $win_use_allocator_shim)",
+    "USE_ALLOCATOR_SHIM=$use_allocator_shim",
+    "ENABLE_WIN_ALLOCATOR_SHIM_TESTS=($use_allocator_shim || $win_use_allocator_shim)",
   ]
 }