Add a GUID to base::SharedMemoryHandle.

mojo/edk/system/platform_wrapper_unittest.cc

 // Copyright 2016 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 <stdint.h>
 #include <string.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 143 matching lines @@
   MojoPlatformHandle os_buffer;
   os_buffer.struct_size = sizeof(MojoPlatformHandle);
   size_t size;
   MojoPlatformSharedBufferHandleFlags flags;
   ASSERT_EQ(MOJO_RESULT_OK,
             MojoUnwrapPlatformSharedBufferHandle(wrapped_handle, &os_buffer,
                                                  &size, &flags));
   bool read_only = flags & MOJO_PLATFORM_SHARED_BUFFER_HANDLE_FLAG_NONE;
   EXPECT_FALSE(read_only);
 
+  // TODO(rockot): Pass GUIDs through Mojo. https://crbug.com/713763.
+  base::UnguessableToken guid = base::UnguessableToken::Create();
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_MACH_PORT, os_buffer.type);
   base::SharedMemoryHandle memory_handle(
-      static_cast<mach_port_t>(os_buffer.value), size);
+      static_cast<mach_port_t>(os_buffer.value), size, guid);
 #elif defined(OS_POSIX)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_FILE_DESCRIPTOR, os_buffer.type);
   base::SharedMemoryHandle memory_handle(
-      base::FileDescriptor(static_cast<int>(os_buffer.value), false));
+      base::FileDescriptor(static_cast<int>(os_buffer.value), false), guid);
 #elif defined(OS_WIN)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_WINDOWS_HANDLE, os_buffer.type);
   base::SharedMemoryHandle memory_handle(
-      reinterpret_cast<HANDLE>(os_buffer.value));
+      reinterpret_cast<HANDLE>(os_buffer.value), guid);
 #endif
 
   base::SharedMemory memory(memory_handle, read_only);
   memory.Map(message.size());
   ASSERT_TRUE(memory.memory());
 
   EXPECT_TRUE(std::equal(message.begin(), message.end(),
                          static_cast<const char*>(memory.memory())));
 }
 
@@ skipping 16 matching lines @@
   MojoHandle wrapped_handle;
   MojoPlatformHandle platform_handle;
   platform_handle.struct_size = 0;
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             MojoWrapPlatformHandle(&platform_handle, &wrapped_handle));
 }
 
 }  // namespace
 }  // namespace edk
 }  // namespace mojo