Remove base/win/metro.{cc|h} and some associated code

components/metrics/metrics_log.cc

Index: components/metrics/metrics_log.cc
diff --git a/components/metrics/metrics_log.cc b/components/metrics/metrics_log.cc
index 3f2d0081f0dc79d9b7bca7aac18228f0a6709dd5..728068f7b4e81a40dfea20eac8034f04e43662bf 100644
--- a/components/metrics/metrics_log.cc
+++ b/components/metrics/metrics_log.cc
@@ -40,8 +40,6 @@
 #endif
 
 #if defined(OS_WIN)
-#include "base/win/metro.h"
-
 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
 extern "C" IMAGE_DOS_HEADER __ImageBase;
 #endif
@@ -329,15 +327,6 @@ void MetricsLog::RecordEnvironment(
 
   SystemProfileProto::OS* os = system_profile->mutable_os();
   std::string os_name = base::SysInfo::OperatingSystemName();
-#if defined(OS_WIN)
-  // TODO(mad): This only checks whether the main process is a Metro process at
-  // upload time; not whether the collected metrics were all gathered from
-  // Metro.  This is ok as an approximation for now, since users will rarely be
-  // switching from Metro to Desktop mode; but we should re-evaluate whether we
-  // can distinguish metrics more cleanly in the future: http://crbug.com/140568
-  if (base::win::IsMetroProcess())
-    os_name += " (Metro)";
-#endif
   os->set_name(os_name);
   os->set_version(base::SysInfo::OperatingSystemVersion());
 #if defined(OS_ANDROID)