Fix the `sizes` regressions in Linux GN.

base/allocator/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.
 
 import("//build/config/allocator.gni")
 import("//build/config/compiler/compiler.gni")
 
 declare_args() {
   # Provide a way to force disable debugallocation in Debug builds,
   # e.g. for profiling (it's more rare to profile Debug builds,
@@ skipping 81 matching lines @@
       deps = [
         ":prep_libc",
         "//base",
       ]
     }
   }
 }
 
 if (use_allocator == "tcmalloc") {
   # tcmalloc currently won't compile on Android.
-  source_set("tcmalloc") {
+  static_library("tcmalloc") {
     tcmalloc_dir = "//third_party/tcmalloc/chromium"
 
     # Don't check tcmalloc's includes. These files include various files like
     # base/foo.h and they actually refer to tcmalloc's forked copy of base
     # rather than the regular one, which confuses the header checker.
     check_includes = false
 
     sources = [
       # Generated for our configuration from tcmalloc's build
       # and checked in.
@@ skipping 152 matching lines @@
     # Make sure the allocation library is optimized as much as possible when
     # we"re in release mode.
     if (!is_debug) {
       configs -= [ "//build/config/compiler:default_optimization" ]
       configs += [ "//build/config/compiler:optimize_max" ]
     }
 
     deps += [ "//base/third_party/dynamic_annotations" ]
   }
 }  # !is_android