Convert utility process ImageWriter IPC to mojo

chrome/utility/chrome_content_utility_ipc_whitelist.h

Index: chrome/utility/chrome_content_utility_ipc_whitelist.h
diff --git a/chrome/utility/chrome_content_utility_ipc_whitelist.h b/chrome/utility/chrome_content_utility_ipc_whitelist.h
deleted file mode 100644
index 518cddcc7f5708cffde872139c7b580a75057989..0000000000000000000000000000000000000000
--- a/chrome/utility/chrome_content_utility_ipc_whitelist.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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 CHROME_UTILITY_CHROME_CONTENT_UTILITY_IPC_WHITELIST_H_
-#define CHROME_UTILITY_CHROME_CONTENT_UTILITY_IPC_WHITELIST_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-// This array contains the list of IPC messages that the utility process will
-// accept when running with elevated privileges.  When new messages need to run
-// with elevated privileges, add them here and be sure to add a security
-// reviewer.
-extern const uint32_t kMessageWhitelist[];
-extern const size_t kMessageWhitelistSize;
-
-#endif  // CHROME_UTILITY_CHROME_CONTENT_UTILITY_IPC_WHITELIST_H_