Remove remaining dependencies on allocation.h from a few platform files

src/platform-win32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Platform-specific code for Win32.
 
 // Secure API functions are not available using MinGW with msvcrt.dll
 // on Windows XP. Make sure MINGW_HAS_SECURE_API is not defined to
 // disable definition of secure API functions in standard headers that
 // would conflict with our own implementation.
@@ skipping 1317 matching lines @@
 // object. The entry function dispatches to the run method in the thread
 // object. It is important that this function has __stdcall calling
 // convention.
 static unsigned int __stdcall ThreadEntry(void* arg) {
   Thread* thread = reinterpret_cast<Thread*>(arg);
   thread->NotifyStartedAndRun();
   return 0;
 }
 
 
-class Thread::PlatformData : public Malloced {
+class Thread::PlatformData {
  public:
   explicit PlatformData(HANDLE thread) : thread_(thread) {}
   HANDLE thread_;
   unsigned thread_id_;
 };
 
 
 // Initialize a Win32 thread object. The thread has an invalid thread
 // handle until it is started.
 
@@ skipping 65 matching lines @@
   ASSERT(result);
 }
 
 
 
 void Thread::YieldCPU() {
   Sleep(0);
 }
 
 } }  // namespace v8::internal