Support modules_typedefs_enums_only_idl_files

Extend modules_idl_files.gni to add support for typedefs_enums_only idl
files to be defined in modules.

R=peria@chromium.org, yukishiino@chromium.org

Change-Id: I5c1464ab47985bd69594e8c3fddceafb3197a1c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336023Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Steven Cohen <peragwin@gmail.com>
Cr-Commit-Position: refs/heads/master@{#794860}

AUTHORS

@@ -953,6 +953,7 @@ Stephan Hartmann <stha09@googlemail.com>
 Stephen Searles <stephen.searles@gmail.com>
 Stephen Sigwart <ssigwart@gmail.com>
 Steve Sanders <steve@zanderz.com>
+Steven Cohen <peragwin@gmail.com>
 Steven Pennington <spenn@engr.uvic.ca>
 Steven Roussey <sroussey@gmail.com>
 Subrahmanya Praveen Munukutla <sataya.m@samsung.com>

third_party/blink/renderer/modules/modules_idl_files.gni

@@ -42,6 +42,10 @@ import("//third_party/blink/renderer/config.gni")
 #     # Similar to |modules_dependency_idl_files| but limited to things that are
 #     # exposed only for testing.
 #   ]
+#
+#   modules_typedefs_enums_only_idl_files = [
+#     # IDL files that only have typedefs/enums.
+#   ]
 _idl_imports = [
   "//third_party/blink/renderer/modules/accessibility/idls.gni",
   "//third_party/blink/renderer/modules/animationworklet/idls.gni",
@@ -144,6 +148,7 @@ modules_callback_function_idl_files = []
 modules_dictionary_idl_files = []
 modules_dependency_idl_files = []
 modules_testing_dependency_idl_files = []
+modules_typedefs_enums_only_idl_files = []
 
 foreach(idl_import, _idl_imports) {
   # Avoid reassignment error by assigning to empty scope first.
@@ -191,6 +196,15 @@ foreach(idl_import, _idl_imports) {
                         gni_dir),
             "abspath")
   }
+
+  if (defined(_imported.modules_typedefs_enums_only_idl_files)) {
+    modules_typedefs_enums_only_idl_files +=
+        get_path_info(
+            rebase_path(_imported.modules_typedefs_enums_only_idl_files,
+                        ".",
+                        gni_dir),
+            "abspath")
+  }
 }
 
 bindings_modules_output_dir = "$bindings_output_dir/modules"
@@ -245,7 +259,8 @@ modules_global_constructors_generated_idl_files = process_file_template(
 modules_definition_idl_files = modules_dictionary_idl_files + modules_idl_files
 
 # Static IDL files
-modules_static_interface_idl_files = modules_callback_function_idl_files
+modules_static_interface_idl_files =
+    modules_callback_function_idl_files + modules_typedefs_enums_only_idl_files
 
 modules_static_dependency_idl_files =
     modules_dependency_idl_files + modules_testing_dependency_idl_files