Make ARM64 detection consistent.

chrome/browser/omaha_query_params/omaha_query_params.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 "chrome/browser/omaha_query_params/omaha_query_params.h"
 
 #include "base/compiler_specific.h"
 #include "base/strings/stringprintf.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 22 matching lines @@
 #error "unknown os"
 #endif
 
 const char kArch[] =
 #if defined(__amd64__) || defined(_WIN64)
     "x64";
 #elif defined(__i386__) || defined(_WIN32)
     "x86";
 #elif defined(__arm__)
     "arm";
-#elif defined(__arm64__)
+#elif defined(__aarch64__)
     "arm64";
 #elif defined(__mips__)
     "mipsel";
 #else
 #error "unknown arch"
 #endif
 
 const char kChrome[] = "chrome";
 
 const char kStable[] = "stable";
@@ skipping 97 matching lines @@
       break;
   }
   return kUnknown;
 }
 
 const char* OmahaQueryParams::GetLang() {
   return g_browser_process->GetApplicationLocale().c_str();
 }
 
 }  // namespace chrome