Remove unused locking functionality from base::SharedMemory.

base/memory/shared_memory_win.cc

Index: base/memory/shared_memory_win.cc
diff --git a/base/memory/shared_memory_win.cc b/base/memory/shared_memory_win.cc
index eacf0d6ccefcd97bd42d6758d4c99597d41f1730..b1f85da93356c895de4d03753ab83589f31d19da 100644
--- a/base/memory/shared_memory_win.cc
+++ b/base/memory/shared_memory_win.cc
@@ -32,8 +32,7 @@ SharedMemory::SharedMemory()
       memory_(NULL),
       read_only_(false),
       mapped_size_(0),
-      requested_size_(0),
-      lock_(NULL) {
+      requested_size_(0) {
 }
 
 SharedMemory::SharedMemory(const std::wstring& name)
@@ -42,7 +41,6 @@ SharedMemory::SharedMemory(const std::wstring& name)
       read_only_(false),
       requested_size_(0),
       mapped_size_(0),
-      lock_(NULL),
       name_(name) {
 }
 
@@ -51,18 +49,17 @@ SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only)
       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 |
@@ -73,8 +70,6 @@ SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only,
 SharedMemory::~SharedMemory() {
   Unmap();
   Close();
-  if (lock_ != NULL)
-    CloseHandle(lock_);
 }
 
 // static
@@ -270,26 +265,6 @@ void SharedMemory::Close() {
   }
 }
 
-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_;
 }