Convert make_names and make_event_factory to use json5 config format.

third_party/WebKit/Source/bindings/modules/BUILD.gn

Index: third_party/WebKit/Source/bindings/modules/BUILD.gn
diff --git a/third_party/WebKit/Source/bindings/modules/BUILD.gn b/third_party/WebKit/Source/bindings/modules/BUILD.gn
index c038ddf0041360cf463aa9b678a650b7f82b835a..39bbb661b09c8b5d70b7528896d1c10e165e1fab 100644
--- a/third_party/WebKit/Source/bindings/modules/BUILD.gn
+++ b/third_party/WebKit/Source/bindings/modules/BUILD.gn
@@ -57,13 +57,13 @@ generate_event_interfaces("modules_bindings_generated_event_interfaces") {
     "//third_party/WebKit/Source/modules/webmidi/MIDIMessageEvent.idl",
     "//third_party/WebKit/Source/modules/websockets/CloseEvent.idl",
   ]
-  output_file = "EventModulesInterfaces.in"
+  output_file = "EventModulesInterfaces.json5"
   suffix = "Modules"
 }
 
 make_event_factory("event_modules") {
   visibility = [ ":*" ]
-  in_files = [ "$root_gen_dir/blink/EventModulesInterfaces.in" ]
+  in_files = [ "$root_gen_dir/blink/EventModulesInterfaces.json5" ]
   outputs = [
     "$blink_modules_output_dir/EventModules.cpp",
     "$blink_modules_output_dir/EventModulesHeaders.h",
@@ -78,7 +78,7 @@ make_event_factory("event_modules") {
 
 make_names("event_modules_names") {
   visibility = [ ":*" ]
-  in_files = [ "$root_gen_dir/blink/EventModulesInterfaces.in" ]
+  in_files = [ "$root_gen_dir/blink/EventModulesInterfaces.json5" ]
   outputs = [
     "$blink_modules_output_dir/EventModulesNames.cpp",
     "$blink_modules_output_dir/EventModulesNames.h",
@@ -88,7 +88,7 @@ make_names("event_modules_names") {
 
 make_names("event_target_modules_names") {
   visibility = [ ":*" ]
-  in_files = [ "../../modules/EventTargetModulesFactory.in" ]
+  in_files = [ "../../modules/EventTargetModulesFactory.json5" ]
   outputs = [
     "$blink_modules_output_dir/EventTargetModulesNames.cpp",
     "$blink_modules_output_dir/EventTargetModulesNames.h",