Enable whitelist generation for all builds.

tools/grit/repack.gni

 # 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.
 
-declare_args() {
-  # Absolute path to a resource whitelist (generated using
-  # //tools/resources/find_used_resources.py).
-  repack_whitelist = ""
-}
-
 # This file defines a template to invoke grit repack in a consistent manner.
 #
 # Parameters:
 #   sources  [required]
 #       List of pak files that need to be combined.
 #
 #   output  [required]
 #       File name (single string) of the output file.
 #
 #   deps  [optional]
@@ skipping 13 matching lines @@
     assert(defined(invoker.output), "Need output for $target_name")
 
     script = "//tools/grit/grit/format/repack.py"
 
     inputs = invoker.sources
     outputs = [
       invoker.output,
     ]
 
     args = []
-    if (repack_whitelist != "") {
-      assert(
-          repack_whitelist == rebase_path(repack_whitelist),
-          "repack_whitelist must be an absolute path. Current value is $repack_whitelist")
-      args += [ "--whitelist=$repack_whitelist" ]
+    if (defined(invoker.repack_whitelist)) {
+      inputs += [ invoker.repack_whitelist ]
+      _rebased_whitelist = rebase_path(invoker.repack_whitelist)
+      args += [ "--whitelist=$_rebased_whitelist" ]
     }
     args += [ rebase_path(invoker.output, root_build_dir) ]
     args += rebase_path(invoker.sources, root_build_dir)
   }
 }
 
 # This template combines repacking resources and defining a bundle_data target
 # to move them to the application bundle. This is mostly useful on iOS.
 #
 # Parameters:
@@ skipping 44 matching lines @@
       outputs = [
         invoker.bundle_output,
       ]
     } else {
       outputs = [
         "{{bundle_resources_dir}}/{{source_file_part}}",
       ]
     }
   }
 }