Makes GetBuildTime behave identically on all build types.

base/base.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
     'base.gypi',
   ],
   'targets': [
     {
       'target_name': 'base',
       'type': '<(component)',
       'toolsets': ['host', 'target'],
       'variables': {
         'base_target': 1,
         'enable_wexit_time_destructors': 1,
         'optimize': 'max',
       },
       'dependencies': [
         'allocator/allocator.gyp:allocator',
         'base_debugging_flags#target',
         'base_static',
+        'base_build_date',
         '../testing/gtest.gyp:gtest_prod',
         '../third_party/modp_b64/modp_b64.gyp:modp_b64',
         'third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
       ],
       # TODO(gregoryd): direct_dependent_settings should be shared with the
       #  64-bit target, but it doesn't work due to a bug in gyp
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
@@ skipping 948 matching lines @@
       # toolchain, always refer to 'base_debugging_flags#target'.
       'target_name': 'base_debugging_flags',
       'includes': [ '../build/buildflag_header.gypi' ],
       'variables': {
         'buildflag_header_path': 'base/debug/debugging_flags.h',
         'buildflag_flags': [
           'ENABLE_PROFILING=<(profiling)',
         ],
       },
     },
+    {
+      'type': 'none',
+      'target_name': 'base_build_date',
+      'actions': [{
+        'action_name': 'generate_build_date_headers',
+        'inputs': [
+          '<(DEPTH)/build/write_build_date_header.py',
+          '<(DEPTH)/build/util/LASTCHANGE'
+        ],
+        'outputs': [ '<(SHARED_INTERMEDIATE_DIR)/base/generated_build_date.h' ],
+        'action': [
+          'python', '<(DEPTH)/build/write_build_date_header.py',
+          '<(SHARED_INTERMEDIATE_DIR)/base/generated_build_date.h',
+          '<(build_type)'
+        ]
+      }],
+      'conditions': [
+        [ 'buildtype == "Official"', {
+          'variables': {
+            'build_type': 'official'
+          }
+        }, {
+          'variables': {
+            'build_type': 'default'
+          }
+        }],
+      ]
+    },
   ],
   'conditions': [
     ['OS=="ios" and "<(GENERATOR)"=="ninja"', {
       'targets': [
         {
           'target_name': 'test_launcher',
           'toolsets': ['host'],
           'type': 'executable',
           'dependencies': [
             'test_support_base',
@@ skipping 35 matching lines @@
       'targets': [
         # The base_win64 target here allows us to use base for Win64 targets
         # (the normal build is 32 bits).
         {
           'target_name': 'base_win64',
           'type': '<(component)',
           'variables': {
             'base_target': 1,
           },
           'dependencies': [
+            'base_build_date',
             'base_debugging_flags#target',
             'base_static_win64',
             '../third_party/modp_b64/modp_b64.gyp:modp_b64_win64',
             'third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations_win64',
             'trace_event/etw_manifest/etw_manifest.gyp:etw_manifest',
           ],
           # TODO(gregoryd): direct_dependent_settings should be shared with the
           # 32-bit target, but it doesn't work due to a bug in gyp
           'direct_dependent_settings': {
             'include_dirs': [
@@ skipping 578 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }