Implement SysInfo::CPUArchitecture() on Windows.

base/sys_info.h

Index: base/sys_info.h
===================================================================
--- base/sys_info.h	(revision 156435)
+++ base/sys_info.h	(working copy)
@@ -5,15 +5,14 @@
 #ifndef BASE_SYS_INFO_H_
 #define BASE_SYS_INFO_H_
 
+#include <string>
+
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/time.h"
+#include "build/build_config.h"
 
-#include <string>
-
-class FilePath;
-
 namespace base {
 
 class BASE_EXPORT SysInfo {
@@ -66,7 +65,7 @@
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Returns the maximum SysV shared memory segment size.
   static size_t MaxSharedMemorySize();
-#endif // defined(OS_POSIX) && !defined(OS_MACOSX)
+#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)
   // Returns the name of the version entry we wish to look up in the
@@ -82,7 +81,7 @@
 
   // Returns the path to the lsb-release file.
   static FilePath GetLsbReleaseFilePath();
-#endif // defined(OS_CHROMEOS)
+#endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)
   // Returns the Android build's codename.
@@ -95,7 +94,7 @@
   static std::string GetDeviceName();
 
   static int DalvikHeapSizeMB();
-#endif // defined(OS_ANDROID)
+#endif  // defined(OS_ANDROID)
 };
 
 }  // namespace base