base: Include intrin.h to get _ReturnAddress from clang

base/location.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 "build/build_config.h"
 
 #if defined(COMPILER_MSVC)
-// MSDN says to #include <intrin.h>, but that breaks the VS2005 build.
-extern "C" {
-  void* _ReturnAddress();
-}
+#include <intrin.h>
 #endif
 
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 
 namespace tracked_objects {
 
 Location::Location(const char* function_name,
                    const char* file_name,
@@ skipping 70 matching lines @@
 BASE_EXPORT const void* GetProgramCounter() {
 #if defined(COMPILER_MSVC)
   return _ReturnAddress();
 #elif defined(COMPILER_GCC) && !defined(OS_NACL)
   return __builtin_extract_return_addr(__builtin_return_address(0));
 #endif  // COMPILER_GCC
   return NULL;
 }
 
 }  // namespace tracked_objects