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

base/sys_info_ios.mm

 // 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/sys_info.h"
 
 #import <UIKit/UIKit.h>
 #include <mach/mach.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/sys_string_conversions.h"
 
 namespace base {
 
 // static
 std::string SysInfo::OperatingSystemName() {
   base::mac::ScopedNSAutoreleasePool pool;
@@ skipping 39 matching lines @@
                          reinterpret_cast<host_info_t>(&hostinfo),
                          &count);
   if (result != KERN_SUCCESS) {
     NOTREACHED();
     return 0;
   }
   DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
   return static_cast<int64>(hostinfo.max_mem);
 }
 
+// static
+std::string SysInfo::CPUModelName() {
+  char name[256];
+  size_t len = arraysize(name);
+  if (sysctlbyname("machdep.cpu.brand_string", &name, &len, NULL, 0) == 0)
+    return name;
+  return std::string();
+}
+
 }  // namespace base