Revert 158217 - Allow extensions which can run without NPAPI to run under Windows 8 Metro.

chrome/browser/extensions/requirements_checker.cc

Index: chrome/browser/extensions/requirements_checker.cc
===================================================================
--- chrome/browser/extensions/requirements_checker.cc	(revision 158694)
+++ chrome/browser/extensions/requirements_checker.cc	(working copy)
@@ -15,10 +15,6 @@
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
-#if defined(OS_WIN)
-#include "base/win/metro.h"
-#endif // defined(OS_WIN)
-
 namespace extensions {
 
 RequirementsChecker::RequirementsChecker()
@@ -40,12 +36,6 @@
     errors_.push_back(
         l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
 #endif  // defined(OS_CHROMEOS)
-#if defined(OS_WIN)
-    if (base::win::IsMetroProcess()) {
-      errors_.push_back(
-          l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
-    }
-#endif  // defined(OS_WIN)
   }
 
   if (requirements.webgl) {