Add more size_t -> int warning fixes for the win x64 GN build.

build/json_schema_api.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.
 
 # Defines a static library corresponding to the output of schema compiler tools
 # over a set of extensions API schemas (IDL or JSON format.) The library target
 # has implicit hard dependencies on all schema files listed by the invoker and
 # is itself a hard dependency.
 #
 # Invocations of this template may use the following variables:
@@ skipping 165 matching lines @@
 
   source_set(target_name) {
     sources = []
     deps = []
     public_deps = []
 
     if (schemas) {
       sources += get_target_outputs(":$schema_generator_name")
       public_deps += [ ":$schema_generator_name" ]
       deps += [ "//tools/json_schema_compiler:generated_api_util" ]
+      configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     }
 
     if (bundle) {
       sources += get_target_outputs(":$bundle_generator_schema_name")
       deps += [ ":$bundle_generator_schema_name" ]
     }
 
     if (bundle_registration) {
       sources += get_target_outputs(":$bundle_generator_registration_name")
       deps += [ ":$bundle_generator_registration_name" ]
     }
 
     if (defined(invoker.deps)) {
       deps += invoker.deps
     }
     public_configs = [ ":$generated_config_name" ]
 
     if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }
     if (defined(invoker.output_name)) {
       output_name = invoker.output_name
     }
   }
 }