Reland of Ensure that builders that use goma strip absolute paths by default.

tools/mb/mb_config.pyl

 # Copyright 2015 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 is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 1711 matching lines @@
       # We don't want to require a runtime dependency on glib in the
       # GN binary; ideally we could just turn glib off, but that doesn't
       # actually work, so we need to pretend to be doing an ozone build
       # in order for the flag to actually take effect.
       'gn_args': 'use_ozone=true',
     },
 
     'goma': {
       # The MB code will properly escape goma_dir if necessary in the GYP
       # code path; the GN code path needs no escaping.
-      'gn_args': 'use_goma=true',
+      # We also set strip_absolute_paths to ensure that we can get deterministic
+      # builds. This isn't just on by default when goma is on so that devs
+      # can do goma builds but still be able to debug by default.
+      'gn_args': 'use_goma=true strip_absolute_paths_from_debug_symbols=true',
     },
 
     'gpu_fyi_tests': {
       'mixins': ['gpu_tests', 'internal_gles2_conform_tests', 'angle_deqp_tests'],
     },
 
     'gpu_tests': {
       'mixins': ['chrome_with_codecs'],
     },
 
@@ skipping 30 matching lines @@
 
     'mac_strip': {
       'gn_args': 'enable_stripping=true',
     },
 
     'mac_views_browser': {
       'gn_args': 'mac_views_browser=true',
     },
 
     'minimal_symbols': {
-      'gn_args': 'symbol_level=1 strip_absolute_paths_from_debug_symbols=true',
+      'gn_args': 'symbol_level=1',
     },
 
     'mipsel': {
       'gn_args': 'target_cpu="mipsel"',
     },
 
     'msan': {
       'gn_args': 'is_msan=true msan_track_origins=2 use_prebuilt_instrumented_libraries=true',
     },
 
@@ skipping 135 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }