Remove unused locking functionality from base::SharedMemory.

base/memory/shared_memory_win.cc

 // Copyright (c) 2011 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.h"
 
 #include <aclapi.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 14 matching lines @@
 
 }  // namespace.
 
 namespace base {
 
 SharedMemory::SharedMemory()
     : mapped_file_(NULL),
       memory_(NULL),
       read_only_(false),
       mapped_size_(0),
-      requested_size_(0),
-      lock_(NULL) {
+      requested_size_(0) {
 }
 
 SharedMemory::SharedMemory(const std::wstring& name)
     : mapped_file_(NULL),
       memory_(NULL),
       read_only_(false),
       requested_size_(0),
       mapped_size_(0),
-      lock_(NULL),
       name_(name) {
 }
 
 SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only)
     : mapped_file_(handle),
       memory_(NULL),
       read_only_(read_only),
       requested_size_(0),
-      mapped_size_(0),
-      lock_(NULL) {
+      mapped_size_(0) {
 }
 
-SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only,
+SharedMemory::SharedMemory(SharedMemoryHandle handle,
+                           bool read_only,
                            ProcessHandle process)
     : mapped_file_(NULL),
       memory_(NULL),
       read_only_(read_only),
       requested_size_(0),
-      mapped_size_(0),
-      lock_(NULL) {
+      mapped_size_(0) {
   ::DuplicateHandle(process, handle,
                     GetCurrentProcess(), &mapped_file_,
                     read_only_ ? FILE_MAP_READ : FILE_MAP_READ |
                         FILE_MAP_WRITE,
                     FALSE, 0);
 }
 
 SharedMemory::~SharedMemory() {
   Unmap();
   Close();
-  if (lock_ != NULL)
-    CloseHandle(lock_);
 }
 
 // static
 bool SharedMemory::IsHandleValid(const SharedMemoryHandle& handle) {
   return handle != NULL;
 }
 
 // static
 SharedMemoryHandle SharedMemory::NULLHandle() {
   return NULL;
@@ skipping 175 matching lines @@
 }
 
 
 void SharedMemory::Close() {
   if (mapped_file_ != NULL) {
     CloseHandle(mapped_file_);
     mapped_file_ = NULL;
   }
 }
 
-void SharedMemory::LockDeprecated() {
-  if (lock_ == NULL) {
-    std::wstring name = name_;
-    name.append(L"lock");
-    lock_ = CreateMutex(NULL, FALSE, name.c_str());
-    if (lock_ == NULL) {
-      DPLOG(ERROR) << "Could not create mutex.";
-      NOTREACHED();
-      return;  // There is nothing good we can do here.
-    }
-  }
-  DWORD result = WaitForSingleObject(lock_, INFINITE);
-  DCHECK_EQ(result, WAIT_OBJECT_0);
-}
-
-void SharedMemory::UnlockDeprecated() {
-  DCHECK(lock_ != NULL);
-  ReleaseMutex(lock_);
-}
-
 SharedMemoryHandle SharedMemory::handle() const {
   return mapped_file_;
 }
 
 }  // namespace base