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

mojo/edk/embedder/embedder.h

 // Copyright 2014 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.
 
 #ifndef MOJO_EDK_EMBEDDER_EMBEDDER_H_
 #define MOJO_EDK_EMBEDDER_EMBEDDER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 91 matching lines @@
 MOJO_SYSTEM_IMPL_EXPORT MojoResult
 CreateSharedBufferWrapper(base::SharedMemoryHandle shared_memory_handle,
                           size_t num_bytes,
                           bool read_only,
                           MojoHandle* mojo_wrapper_handle);
 
 // Retrieves the underlying |SharedMemoryHandle| from a shared buffer
 // |MojoHandle| and closes the handle. If successful, |num_bytes| will contain
 // the size of the shared memory buffer and |read_only| will contain whether the
 // buffer handle is read-only. Both |num_bytes| and |read_only| may be null.
-// Note: The value of |shared_memory_handle| may be
-// base::SharedMemory::NULLHandle(), even if this function returns success.
+// Note: |shared_memory_handle| may be invalid even if this function returns
+// success.
 // Callers should perform appropriate checks.
 MOJO_SYSTEM_IMPL_EXPORT MojoResult
 PassSharedMemoryHandle(MojoHandle mojo_handle,
                        base::SharedMemoryHandle* shared_memory_handle,
                        size_t* num_bytes,
                        bool* read_only);
 
 // Initialialization/shutdown for interprocess communication (IPC) -------------
 
 // |InitIPCSupport()| sets up the subsystem for interprocess communication,
@@ skipping 40 matching lines @@
 //
 // Default property values:
 //   |MOJO_PROPERTY_TYPE_SYNC_CALL_ALLOWED| - true
 MOJO_SYSTEM_IMPL_EXPORT MojoResult SetProperty(MojoPropertyType type,
                                                const void* value);
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_EMBEDDER_H_