Deleted OS_WIN and all Windows specific files from base.

base/memory/raw_scoped_refptr_mismatch_checker.h

Index: base/memory/raw_scoped_refptr_mismatch_checker.h
diff --git a/base/memory/raw_scoped_refptr_mismatch_checker.h b/base/memory/raw_scoped_refptr_mismatch_checker.h
index 01905588058789d8495cedaf556681924f4f32e5..dd37fcb6c94c914dfd4fe6890d3573fa6ca905c6 100644
--- a/base/memory/raw_scoped_refptr_mismatch_checker.h
+++ b/base/memory/raw_scoped_refptr_mismatch_checker.h
@@ -25,11 +25,6 @@ namespace internal {
 
 template <typename T>
 struct NeedsScopedRefptrButGetsRawPtr {
-#if defined(OS_WIN)
-  enum {
-    value = base::false_type::value
-  };
-#else
   enum {
     // Human readable translation: you needed to be a scoped_refptr if you are a
     // raw pointer type and are convertible to a RefCounted(Base|ThreadSafeBase)
@@ -38,7 +33,6 @@ struct NeedsScopedRefptrButGetsRawPtr {
              (is_convertible<T, subtle::RefCountedBase*>::value ||
               is_convertible<T, subtle::RefCountedThreadSafeBase*>::value))
   };
-#endif
 };
 
 template <typename Params>