Revert of replace COMPILE_ASSERT with static_assert in chrome/installer/

chrome/installer/util/shell_util.cc

 // Copyright (c) 2012 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.
 //
 // This file defines functions that integrate Chrome in Windows shell. These
 // functions can be used by Chrome as well as Chrome installer. All of the
 // work is done by the local functions defined in anonymous namespace in
 // this class.
 
 #include "chrome/installer/util/shell_util.h"
@@ skipping 133 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(UserSpecificRegistrySuffix);
 };  // class UserSpecificRegistrySuffix
 
 UserSpecificRegistrySuffix::UserSpecificRegistrySuffix() {
   base::string16 user_sid;
   if (!base::win::GetUserSidString(&user_sid)) {
     NOTREACHED();
     return;
   }
-  static_assert(sizeof(base::MD5Digest) == 16,
-                "size of MD5Digest should be 16");
+  COMPILE_ASSERT(sizeof(base::MD5Digest) == 16, size_of_MD5_not_as_expected_);
   base::MD5Digest md5_digest;
   std::string user_sid_ascii(base::UTF16ToASCII(user_sid));
   base::MD5Sum(user_sid_ascii.c_str(), user_sid_ascii.length(), &md5_digest);
   const base::string16 base32_md5(
       ShellUtil::ByteArrayToBase32(md5_digest.a, arraysize(md5_digest.a)));
   // The value returned by the base32 algorithm above must never change and
   // must always be 26 characters long (i.e. if someone ever moves this to
   // base and implements the full base32 algorithm (i.e. with appended '='
   // signs in the output), they must provide a flag to allow this method to
   // still request the output with no appended '=' signs).
@@ skipping 2304 matching lines @@
   base::string16 key_path(ShellUtil::kRegClasses);
   key_path.push_back(base::FilePath::kSeparators[0]);
   key_path.append(prog_id);
   return InstallUtil::DeleteRegistryKey(
       HKEY_CURRENT_USER, key_path, WorkItem::kWow64Default);
 
   // TODO(mgiuca): Remove the extension association entries. This requires that
   // the extensions associated with a particular prog_id are stored in that
   // prog_id's key.
 }