Fix some clang warnings with -Wmissing-braces in base.

base/win/windows_version.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.
 
 #include "base/win/windows_version.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 55 matching lines @@
     }
   } else if (version_number_.major == 10) {
     version_ = VERSION_WIN10;
   } else if (version_number_.major > 6) {
     NOTREACHED();
     version_ = VERSION_WIN_LAST;
   }
   service_pack_.major = version_info.wServicePackMajor;
   service_pack_.minor = version_info.wServicePackMinor;
 
-  SYSTEM_INFO system_info = { 0 };
+  SYSTEM_INFO system_info = {};
   ::GetNativeSystemInfo(&system_info);
   switch (system_info.wProcessorArchitecture) {
     case PROCESSOR_ARCHITECTURE_INTEL: architecture_ = X86_ARCHITECTURE; break;
     case PROCESSOR_ARCHITECTURE_AMD64: architecture_ = X64_ARCHITECTURE; break;
     case PROCESSOR_ARCHITECTURE_IA64:  architecture_ = IA64_ARCHITECTURE; break;
   }
   processors_ = system_info.dwNumberOfProcessors;
   allocation_granularity_ = system_info.dwAllocationGranularity;
 
   GetProductInfoPtr get_product_info;
@@ skipping 82 matching lines @@
     return WOW64_UNKNOWN;
   return is_wow64 ? WOW64_ENABLED : WOW64_DISABLED;
 }
 
 Version GetVersion() {
   return OSInfo::GetInstance()->version();
 }
 
 }  // namespace win
 }  // namespace base