Fixed a memory leak in v8 and another one in d8.

test/cctest/test-lockers.cc

 // Copyright 2007-2011 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 271 matching lines @@
   const int kNThreads = 50;
 #else
   const int kNThreads = 100;
 #endif
   v8::Isolate* isolate = v8::Isolate::New();
   i::List<JoinableThread*> threads(kNThreads);
   for (int i = 0; i < kNThreads; i++) {
     threads.Add(new IsolateNestedLockingThread(isolate));
   }
   StartJoinAndDeleteThreads(threads);
+  isolate->Dispose();
 }
 
 
 class SeparateIsolatesLocksNonexclusiveThread : public JoinableThread {
  public:
   SeparateIsolatesLocksNonexclusiveThread(v8::Isolate* isolate1,
                                           v8::Isolate* isolate2)
     : JoinableThread("SeparateIsolatesLocksNonexclusiveThread"),
       isolate1_(isolate1), isolate2_(isolate2) {
   }
@@ skipping 275 matching lines @@
     v8::Locker locker_(isolate);
     v8::Isolate::Scope isolate_scope(isolate);
     v8::HandleScope handle_scope;
     context = v8::Context::New();
   }
   i::List<JoinableThread*> threads(kNThreads);
   for (int i = 0; i < kNThreads; i++) {
     threads.Add(new LockUnlockLockThread(isolate, context));
   }
   StartJoinAndDeleteThreads(threads);
+  isolate->Dispose();
 }
 
 class LockUnlockLockDefaultIsolateThread : public JoinableThread {
  public:
   explicit LockUnlockLockDefaultIsolateThread(v8::Handle<v8::Context> context)
     : JoinableThread("LockUnlockLockDefaultIsolateThread"),
       context_(context) {
   }
 
   virtual void Run() {
@@ skipping 115 matching lines @@
                                           kSimpleExtensionSource));
   const char* extension_names[] = { "test0", "test1",
                                     "test2", "test3", "test4",
                                     "test5", "test6", "test7" };
   i::List<JoinableThread*> threads(kNThreads);
   for (int i = 0; i < kNThreads; i++) {
     threads.Add(new IsolateGenesisThread(8, extension_names));
   }
   StartJoinAndDeleteThreads(threads);
 }