Introduce PlatformNotification structures and converters

third_party/WebKit/public/BUILD.gn

Index: third_party/WebKit/public/BUILD.gn
diff --git a/third_party/WebKit/public/BUILD.gn b/third_party/WebKit/public/BUILD.gn
index da205b83955e7605bb01cfca895bdf8cceca4a93..c849338855d671e7c25d08254525d50bb58c59e8 100644
--- a/third_party/WebKit/public/BUILD.gn
+++ b/third_party/WebKit/public/BUILD.gn
@@ -174,9 +174,26 @@ grit("image_resources") {
   ]
 }
 
-mojom("mojo_bindings") {
+# GYP version: WebKit/public/blink.gyp:blink_mojo_sources
+source_set("blink_mojo_sources") {
   sources = [
     "platform/modules/bluetooth/web_bluetooth.mojom",
     "platform/modules/notifications/notification.mojom",
   ]
 }
+
+# GYP version: WebKit/public/blink.gyp:mojo_bindings_blink_mojom
+mojom("mojo_bindings_blink") {
+  deps = [
+    ":blink_mojo_sources",
+  ]
+  for_blink = true
+  variant = "blink"
+}
+
+# GYP version: WebKit/public/blink.gyp:mojo_bindings_mojom
+mojom("mojo_bindings") {
+  deps = [
+    ":blink_mojo_sources",
+  ]
+}