Fold most logic from //base/allocator into //base.

base/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 1065 matching lines @@
     "win/wait_chain.cc",
     "win/wait_chain.h",
     "win/win_util.cc",
     "win/win_util.h",
     "win/windows_version.cc",
     "win/windows_version.h",
     "win/wrapped_window_proc.cc",
     "win/wrapped_window_proc.h",
   ]
 
+  all_dependent_configs = []
   defines = []
   data = []
 
   configs += [
     ":base_flags",
     ":base_implementation",
     "//base/allocator:allocator_shim_define",  # for allocator_check.cc.
     "//build/config:precompiled_headers",
   ]
 
@@ skipping 10 matching lines @@
     ":build_date",
     ":debugging_flags",
   ]
 
   # Needed for <atomic> if using newer C++ library than sysroot
   if (!use_sysroot && (is_android || (is_linux && !is_chromecast))) {
     libs = [ "atomic" ]
   }
 
   if (use_experimental_allocator_shim) {
-    # The allocator shim is part of the base API. This is to allow clients of
-    # base should to install hooks into the allocator path.
-    public_deps += [ "//base/allocator:unified_allocator_shim" ]
+    # TODO(primiano): support other platforms, currently this works only on
+    # Linux/CrOS/Android. http://crbug.com/550886 .
+    sources += [
+      "allocator/allocator_shim.cc",
+      "allocator/allocator_shim.h",
+      "allocator/allocator_shim_internals.h",
+      "allocator/allocator_shim_override_cpp_symbols.h",
+      "allocator/allocator_shim_override_libc_symbols.h",
+    ]
+    if (is_win) {
+      sources += [
+        "allocator/allocator_shim_default_dispatch_to_winheap.cc",
+        "allocator/allocator_shim_override_ucrt_symbols_win.h",
+        "allocator/winheap_stubs_win.cc",
+        "allocator/winheap_stubs_win.h",
+      ]
+    } else if (is_linux && use_allocator == "tcmalloc") {
+      sources += [
+        "allocator/allocator_shim_default_dispatch_to_tcmalloc.cc",
+        "allocator/allocator_shim_override_glibc_weak_symbols.h",
+      ]
+      deps += [ "//base/allocator:tcmalloc" ]
+    } else if (is_linux && use_allocator == "none") {
+      sources += [ "allocator/allocator_shim_default_dispatch_to_glibc.cc" ]
+    } else if (is_android && use_allocator == "none") {
+      sources += [
+        "allocator/allocator_shim_default_dispatch_to_linker_wrapped_symbols.cc",
+        "allocator/allocator_shim_override_linker_wrapped_symbols.h",
+      ]
+      all_dependent_configs += [ "//base/allocator:wrap_malloc_symbols" ]
+    }
   }
 
   # Allow more direct string conversions on platforms with native utf8
   # strings
   if (is_mac || is_ios || is_chromeos || is_chromecast) {
     defines += [ "SYSTEM_NATIVE_UTF8" ]
   }
 
   # Android.
   if (is_android) {
@@ skipping 240 matching lines @@
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
     libs = [
       "cfgmgr32.lib",
       "powrprof.lib",
       "setupapi.lib",
       "userenv.lib",
       "winmm.lib",
     ]
-    all_dependent_configs = [ ":base_win_linker_flags" ]
+    all_dependent_configs += [ ":base_win_linker_flags" ]
   } else if (!is_nacl || is_nacl_nonsfi) {
     # Non-Windows.
     deps += [ "//base/third_party/libevent" ]
   }
 
   # Desktop Mac.
   if (is_mac) {
     sources += [
       "mac/scoped_typeref.h",
       "power_monitor/power_monitor_device_source_mac.mm",
@@ skipping 36 matching lines @@
 
     # TODO(brettw) this will need to be parameterized at some point.
     linux_configs = []
     if (use_glib) {
       linux_configs += [ "//build/config/linux:glib" ]
     }
 
     defines += [ "USE_SYMBOLIZE" ]
 
     configs += linux_configs
-    all_dependent_configs = linux_configs
+    all_dependent_configs += linux_configs
 
     # These dependencies are not required on Android, and in the case
     # of xdg_mime must be excluded due to licensing restrictions.
     deps += [
       "//base/third_party/symbolize",
       "//base/third_party/xdg_mime",
       "//base/third_party/xdg_user_dirs",
     ]
   } else {
     # Non-Linux.
@@ skipping 1142 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }