Valgrind cleanliness, part 5: Delete extensions on exit.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 494 matching lines @@
 RegisteredExtension::RegisteredExtension(Extension* extension)
     : extension_(extension) { }
 
 
 void RegisteredExtension::Register(RegisteredExtension* that) {
   that->next_ = first_extension_;
   first_extension_ = that;
 }
 
 
+void RegisteredExtension::UnregisterAll() {
+  RegisteredExtension* re = first_extension_;
+  while (re != NULL) {
+    RegisteredExtension* next = re->next();
+    delete re;
+    re = next;
+  }
+}
+
+
 void RegisterExtension(Extension* that) {
   RegisteredExtension* extension = new RegisteredExtension(that);
   RegisteredExtension::Register(extension);
 }
 
 
 Extension::Extension(const char* name,
                      const char* source,
                      int dep_count,
                      const char** deps,
@@ skipping 5841 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* scope_implementer =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   scope_implementer->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal