macOS: Shim all malloc zones.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index f82f436086f9a6c357125d25b8d023b752749a62..5f1b6d0e3603caabed830d027f94e1f530ddefaf 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -152,6 +152,8 @@ component("base") {
     "allocator/allocator_interception_mac.h",
     "allocator/allocator_interception_mac.mm",
     "allocator/allocator_shim.h",
+    "allocator/malloc_zone_functions_mac.cc",
+    "allocator/malloc_zone_functions_mac.h",
     "android/animation_frame_time_histogram.cc",
     "android/animation_frame_time_histogram.h",
     "android/apk_assets.cc",
@@ -1885,6 +1887,7 @@ if (is_ios || is_mac) {
 
 test("base_unittests") {
   sources = [
+    "allocator/malloc_zone_functions_mac_unittest.cc",
     "allocator/tcmalloc_unittest.cc",
     "android/application_status_listener_unittest.cc",
     "android/content_uri_utils_unittest.cc",