Convert RuntimeEnabledFeatures.in config file to JSON format.

third_party/WebKit/Source/platform/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/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 80 matching lines @@
   args = [
     rebase_path(http_names_in, root_build_dir),
     "--output_dir",
     rebase_path(blink_platform_output_dir, root_build_dir),
   ]
 }
 
 action("runtime_enabled_features") {
   script = "../build/scripts/make_runtime_features.py"
 
-  runtime_enabled_features_in = "RuntimeEnabledFeatures.in"
+  runtime_enabled_features_json5 = "RuntimeEnabledFeatures.json5"
   inputs = scripts_for_in_files + [
-             runtime_enabled_features_in,
+             runtime_enabled_features_json5,
              "../build/scripts/templates/RuntimeEnabledFeatures.cpp.tmpl",
              "../build/scripts/templates/RuntimeEnabledFeatures.h.tmpl",
            ]
 
   outputs = [
     "$blink_platform_output_dir/RuntimeEnabledFeatures.cpp",
     "$blink_platform_output_dir/RuntimeEnabledFeatures.h",
   ]
 
   args = [
-    rebase_path(runtime_enabled_features_in, root_build_dir),
+    rebase_path(runtime_enabled_features_json5, root_build_dir),
     "--output_dir",
     rebase_path(blink_platform_output_dir, root_build_dir),
   ]
 }
 
 action("color_data") {
   script = "../build/scripts/gperf.py"
 
   color_data_gperf = "ColorData.gperf"
   inputs = [
@@ skipping 1986 matching lines @@
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }