Refine systemInfo.cpu API defintions and provide systemInfo.cpu.get impl for Windows and Linux

base/sys_info.h

 // 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.
 
 #ifndef BASE_SYS_INFO_H_
 #define BASE_SYS_INFO_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 37 matching lines @@
   // family from base/mac/mac_util.h, or base::win::GetVersion from
   // base/win/windows_version.h.
   static void OperatingSystemVersionNumbers(int32* major_version,
                                             int32* minor_version,
                                             int32* bugfix_version);
 
   // Returns the CPU architecture of the system. Exact return value may differ
   // across platforms.
   static std::string CPUArchitecture();
 
+  // Returns the CPU model name of the system.

[Mark Mentovai, 2012/09/06 14:38:14]

Document “unknown”.

Although personally I’d prefer the empty string. It’s not clear to me, but it
appears that you would already use the empty string in the case of a failure on
Windows.

[Hongbo Min, 2012/09/06 14:45:00]

Agree to use empty string directly instead of “unknown". Done

+  static std::string CPUModelName();
+
   // Return the smallest amount of memory (in bytes) which the VM system will
   // allocate.
   static size_t VMAllocationGranularity();
 
 #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)
 
 #if defined(OS_CHROMEOS)
@@ skipping 22 matching lines @@
   // Returns the device's name.
   static std::string GetDeviceName();
 
   static int DalvikHeapSizeMB();
 #endif // defined(OS_ANDROID)
 };
 
 }  // namespace base
 
 #endif  // BASE_SYS_INFO_H_