Get rid of base::SharedMemory::NULLHandle();

base/memory/shared_memory_handle_win.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/shared_memory_handle.h"
 
 #include "base/logging.h"
 
 namespace base {
 
@@ skipping 12 matching lines @@
     const SharedMemoryHandle& handle) {
   if (this == &handle)
     return *this;
 
   handle_ = handle.handle_;
   pid_ = handle.pid_;
   ownership_passes_to_ipc_ = handle.ownership_passes_to_ipc_;
   return *this;
 }
 
-bool SharedMemoryHandle::operator==(const SharedMemoryHandle& handle) const {
-  // Invalid handles are always equal.
-  if (!IsValid() && !handle.IsValid())
-    return true;
-
-  return handle_ == handle.handle_ && pid_ == handle.pid_;
-}
-
-bool SharedMemoryHandle::operator!=(const SharedMemoryHandle& handle) const {
-  return !(*this == handle);
-}
-
 void SharedMemoryHandle::Close() const {
   DCHECK(handle_ != nullptr);
   DCHECK(BelongsToCurrentProcess());
   ::CloseHandle(handle_);
 }
 
 bool SharedMemoryHandle::IsValid() const {
   return handle_ != nullptr;
 }
 
@@ skipping 15 matching lines @@
 
 void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {
   ownership_passes_to_ipc_ = ownership_passes;
 }
 
 bool SharedMemoryHandle::OwnershipPassesToIPC() const {
   return ownership_passes_to_ipc_;
 }
 
 }  // namespace base