Rename source_prereqs to inputs in the GN build.

build/secondary/tools/grit/grit_rule.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.
 
 # Instantiate grit. This will produce a script target to run grit, and a
 # static library that compiles the .cc files.
 #
 # Parameters
 #
 #   source
@@ skipping 191 matching lines @@
   # (like "mycomponent/foo.h"). This config sets up the include path.
   grit_config = target_name + "_grit_config"
   config(grit_config) {
     include_dirs = [ target_gen_dir ]
     visibility = target_visibility
   }
 
   grit_custom_target = target_name + "_grit"
   action(grit_custom_target) {
     script = "//tools/grit/grit.py"
-    source_prereqs = grit_inputs
+    inputs = grit_inputs
     outputs = grit_outputs
 
     args = [
       "-i", source_path, "build",
       "-f", resource_ids,
       "-o", output_dir,
     ] + grit_defines + grit_flags
 
     visibility = target_visibility
 
@@ skipping 15 matching lines @@
     direct_dependent_configs = [ ":$grit_config" ]
 
     if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }
     if (defined(invoker.output_name)) {
       output_name = invoker.output_name
     }
   }
 }