[Mac/GN] Clean up old version folders in Chromium.app/Contents/Versions.

chrome/BUILD.gn

 # 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 604 matching lines @@
     sources = [
       "$root_out_dir/$chrome_framework_name.framework",
       "$root_out_dir/$chrome_helper_name.app",
     ]
     outputs = [
       "{{bundle_root_dir}}/Versions/$chrome_version_full/{{source_file_part}}",
     ]
     public_deps = [
       ":chrome_helper_app",
 
+      # Before bundling the versioned app components, delete any existing
+      # versions.
+      ":clean_up_old_versions",
+
       # keystone_registration_framework copies the framework into the framework
       # bundle via a script that performs additional actions, rather than
       # relying on a bundle_data to copy it.
       ":keystone_registration_framework",
 
       # verify_chrome_framework_order depends on :chrome_framework and, for
       # non-component builds, will ensure the export symbol table is correct.
       ":verify_chrome_framework_order",
     ]
   }
 
+  action("clean_up_old_versions") {
+    script = "//chrome/tools/build/mac/clean_up_old_versions.py"
+    outputs = [
+      "$root_gen_dir/run_$target_name.stamp",
+    ]
+    args = [
+             rebase_path("$root_out_dir/$chrome_product_full_name.app",
+                         root_build_dir),
+             "$chrome_version_full",
+           ] + rebase_path(outputs, root_build_dir)
+  }
+
   tweak_info_plist("chrome_helper_plist") {
     info_plist = "app/helper-Info.plist"
     args = [
       "--breakpad=0",
       "--keystone=0",
       "--scm=0",
     ]
   }
 
   mac_app_bundle("chrome_helper_app") {
@@ skipping 1166 matching lines @@
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }