GN: fix bootstrap

tools/gn/bootstrap/bootstrap.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 # This file isn't officially supported by the Chromium project. It's maintained
 # on a best-effort basis by volunteers, so some things may be broken from time
 # to time. If you encounter errors, it's most often due to files in base that
 # have been added or moved since somebody last tried this script. Generally
 # such errors are easy to diagnose.
@@ skipping 96 matching lines @@
       return run_build(build_dir, options)
     else:
       with scoped_tempdir() as tempdir:
         return run_build(tempdir, options)
   except subprocess.CalledProcessError as e:
     print >> sys.stderr, str(e)
     return 1
   return 0
 
 
+def write_buildflag_header_manually(root_gen_dir, header, flags):
+  mkdir_p(os.path.join(root_gen_dir, os.path.dirname(header)))
+  with tempfile.NamedTemporaryFile() as f:
+    f.write('--flags')
+    for name,value in flags.items():
+      f.write(' ' + name + '=' + value)
+    f.flush()
+
+    check_call([
+        os.path.join(SRC_ROOT, 'build', 'write_buildflag_header.py'),
+        '--output', header,
+        '--gen-dir', root_gen_dir,
+        '--definitions', f.name,
+    ])
+
+
 def build_gn_with_ninja_manually(tempdir, options):
   root_gen_dir = os.path.join(tempdir, 'gen')
   mkdir_p(root_gen_dir)
 
-  mkdir_p(os.path.join(root_gen_dir, 'base', 'allocator'))
-  with tempfile.NamedTemporaryFile() as f:
-    f.write('--flags USE_EXPERIMENTAL_ALLOCATOR_SHIM=%s'
-            % ('true' if is_linux else 'false'))
-    f.flush()
+  write_buildflag_header_manually(root_gen_dir, 'base/allocator/features.h',
+      {'USE_EXPERIMENTAL_ALLOCATOR_SHIM': 'true' if is_linux else 'false'})
 
-    check_call([
-        os.path.join(SRC_ROOT, 'build', 'write_buildflag_header.py'),
-        '--output', 'base/allocator/features.h',
-        '--gen-dir', root_gen_dir,
-        '--definitions', f.name,
-    ])
+  write_buildflag_header_manually(root_gen_dir, 'base/debug/debugging_flags.h',
+      {'ENABLE_PROFILING': 'false'})
 
   if is_mac:
     # //base/build_time.cc needs base/generated_build_date.h,
     # and this file is only included for Mac builds.
     mkdir_p(os.path.join(root_gen_dir, 'base'))
     check_call([
         os.path.join(SRC_ROOT, 'build', 'write_build_date_header.py'),
         os.path.join(root_gen_dir, 'base', 'generated_build_date.h'),
         'default'
     ])
@@ skipping 370 matching lines @@
     cmd.append('-v')
   cmd.append('gn')
   check_call(cmd)
 
   if not options.debug:
     check_call(['strip', os.path.join(build_dir, 'gn')])
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))