Revert "Add precompiled headers to GN build for large targets."

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 29 matching lines @@
 #   The path containing C++ implementations of API functions. This path is
 #   used as the root path when looking for {schema}/{schema}_api.h headers
 #   when generating API registration bundles. Such headers, if found, are
 #   automatically included by the generated code.
 #
 # uncompiled_sources [optional, only used when bundle = true or
 #     bundle_registration = true]
 #   A list of schema files which should not be compiled, but which should still
 #   be processed for API bundle generation.
 #
-# configs [optional]
-#   Extra configs to apply to the compile step.
-#
 # deps [optional]
 #   If any deps are specified they will be inherited by the static library
 #   target.
 #
 # generate_static_library [optional, defaults to false]
 #   Produces a static library instead of a source_set.
 #
 # The generated library target also inherits the visibility and output_name
 # of its invoker.
 
@@ skipping 131 matching lines @@
              ] + rebase_path(invoker.sources, root_build_dir) +
              rebase_path(uncompiled_sources, root_build_dir)
     }
   }
 
   # Compute the contents of the library/source set.
   lib_sources = invoker.sources
   lib_deps = []
   lib_public_deps = []
   lib_extra_configs = []
-  if (defined(invoker.configs)) {
-    lib_extra_configs += invoker.configs
-  }
 
   if (schemas) {
     lib_sources += get_target_outputs(":$schema_generator_name")
     lib_public_deps += [ ":$schema_generator_name" ]
     lib_deps += [ "//tools/json_schema_compiler:generated_api_util" ]
     lib_extra_configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   }
 
   if (bundle) {
     lib_sources += get_target_outputs(":$bundle_generator_schema_name")
@@ skipping 36 matching lines @@
 
       if (defined(invoker.visibility)) {
         visibility = invoker.visibility
       }
       if (defined(invoker.output_name)) {
         output_name = invoker.output_name
       }
     }
   }
 }