Issue 5201 - [emscripten] Replace EM_ASM calls by a custom JavaScript library

compiled/FilterNotifier.h

Index: compiled/FilterNotifier.h
===================================================================
--- a/compiled/FilterNotifier.h
+++ b/compiled/FilterNotifier.h
@@ -55,11 +55,24 @@ namespace FilterNotifier
     printf("  [%i, 'subscription.homepage'],\n", Topic::SUBSCRIPTION_HOMEPAGE);
     printf("  [%i, 'subscription.lastCheck'],\n", Topic::SUBSCRIPTION_LASTCHECK);
     printf("  [%i, 'subscription.lastDownload'],\n", Topic::SUBSCRIPTION_LASTDOWNLOAD);
     printf("  [%i, 'subscription.downloadStatus'],\n", Topic::SUBSCRIPTION_DOWNLOADSTATUS);
     printf("  [%i, 'subscription.errors'],\n", Topic::SUBSCRIPTION_ERRORS);
     printf("]);");
   }
 
-  void FilterChange(Topic topic, Filter* filter);
-  void SubscriptionChange(Topic topic, Subscription* subscription);
+  extern "C" {
+    void JSNotifyFilterChange(Topic topic, Filter* filter);
+    void JSNotifySubscriptionChange(Topic topic,
+        Subscription* subscription);
+  }
+
+  inline void FilterChange(Topic topic, Filter* filter)
+  {
+    JSNotifyFilterChange(topic, filter);
+  }
+
+  inline void SubscriptionChange(Topic topic, Subscription* subscription)
+  {
+    JSNotifySubscriptionChange(topic, subscription);
+  }
 }