Add a GUID to base::SharedMemoryHandle.

mojo/edk/embedder/platform_shared_buffer.cc

 // 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.
 
 #include "mojo/edk/embedder/platform_shared_buffer.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 215 matching lines @@
   options.share_read_only = true;
 
   shared_memory_.reset(new base::SharedMemory);
   return shared_memory_->Create(options);
 }
 
 bool PlatformSharedBuffer::InitFromPlatformHandle(
     ScopedPlatformHandle platform_handle) {
   DCHECK(!shared_memory_);
 
+  // TODO(rockot): Pass GUIDs through Mojo. https://crbug.com/713763.
+  base::UnguessableToken guid = base::UnguessableToken::Create();
 #if defined(OS_WIN)
-  base::SharedMemoryHandle handle(platform_handle.release().handle);
+  base::SharedMemoryHandle handle(platform_handle.release().handle, guid);
 #elif defined(OS_MACOSX) && !defined(OS_IOS)
-  base::SharedMemoryHandle handle;
-  handle = base::SharedMemoryHandle(platform_handle.release().port, num_bytes_);
+  base::SharedMemoryHandle handle = base::SharedMemoryHandle(
+      platform_handle.release().port, num_bytes_, guid);
 #else
   base::SharedMemoryHandle handle(
-      base::FileDescriptor(platform_handle.release().handle, false));
+      base::FileDescriptor(platform_handle.release().handle, false), guid);
 #endif
 
   shared_memory_.reset(new base::SharedMemory(handle, read_only_));
   return true;
 }
 
 bool PlatformSharedBuffer::InitFromPlatformHandlePair(
     ScopedPlatformHandle rw_platform_handle,
     ScopedPlatformHandle ro_platform_handle) {
 #if defined(OS_MACOSX)
   NOTREACHED();
   return false;
 #else  // defined(OS_MACOSX)
 
+  // TODO(rockot): Pass GUIDs through Mojo. https://crbug.com/713763.
+  base::UnguessableToken guid = base::UnguessableToken::Create();
 #if defined(OS_WIN)
-  base::SharedMemoryHandle handle(rw_platform_handle.release().handle);
-  base::SharedMemoryHandle ro_handle(ro_platform_handle.release().handle);
+  base::SharedMemoryHandle handle(rw_platform_handle.release().handle, guid);
+  base::SharedMemoryHandle ro_handle(ro_platform_handle.release().handle, guid);
 #else  // defined(OS_WIN)
   base::SharedMemoryHandle handle(
-      base::FileDescriptor(rw_platform_handle.release().handle, false));
+      base::FileDescriptor(rw_platform_handle.release().handle, false), guid);
   base::SharedMemoryHandle ro_handle(
-      base::FileDescriptor(ro_platform_handle.release().handle, false));
+      base::FileDescriptor(ro_platform_handle.release().handle, false), guid);
 #endif  // defined(OS_WIN)
 
   DCHECK(!shared_memory_);
   shared_memory_.reset(new base::SharedMemory(handle, false));
   ro_shared_memory_.reset(new base::SharedMemory(ro_handle, true));
   return true;
 
 #endif  // defined(OS_MACOSX)
 }
 
@@ skipping 36 matching lines @@
   base_ = static_cast<char*>(shared_memory_.memory()) + offset_rounding;
   return true;
 }
 
 void PlatformSharedBufferMapping::Unmap() {
   shared_memory_.Unmap();
 }
 
 }  // namespace edk
 }  // namespace mojo