removeUnloadableExtensions() for upsource

platform/extensions/src/com/intellij/openapi/extensions/impl/ExtensionPointImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2014 JetBrains s.r.o.
+ * Copyright 2000-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -261,6 +261,19 @@ public class ExtensionPointImpl<T> implements ExtensionPoint<T> {
     }
   }
 
+  @SuppressWarnings("unused") // upsource
+  public synchronized void removeUnloadableExtensions() {
+    ExtensionComponentAdapter[] adapters = myExtensionAdapters.toArray(new ExtensionComponentAdapter[myExtensionAdapters.size()]);
+    for (ExtensionComponentAdapter adapter : adapters) {
+      try {
+        adapter.getComponentImplementation();
+      }
+      catch (Throwable e) {
+        unregisterExtensionAdapter(adapter);
+      }
+    }
+  }
+
   @Override
   @Nullable
   public T getExtension() {
@@ -423,7 +436,7 @@ public class ExtensionPointImpl<T> implements ExtensionPoint<T> {
     myExtensionsCache = null;
   }
 
-  synchronized boolean unregisterExtensionAdapter(@NotNull ExtensionComponentAdapter adapter) {
+  public synchronized boolean unregisterExtensionAdapter(@NotNull ExtensionComponentAdapter adapter) {
     try {
       if (myExtensionAdapters.remove(adapter)) {
         return true;