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

chrome/installer/util/install_util.h

Index: chrome/installer/util/install_util.h
diff --git a/chrome/installer/util/install_util.h b/chrome/installer/util/install_util.h
index 6371711ec71ddb7b2a153b1a73ea386608ac71f5..672f0ff8d854c8076c040e948848155d544be528 100644
--- a/chrome/installer/util/install_util.h
+++ b/chrome/installer/util/install_util.h
@@ -32,10 +32,6 @@ class Version;
 // independently.
 class InstallUtil {
  public:
-  // Returns true if properties that enable Metro mode on Win8+ should be
-  // installed.
-  static bool ShouldInstallMetroProperties();
-
   // Get the path to this distribution's Active Setup registry entries.
   // e.g. Software\Microsoft\Active Setup\Installed Components\<dist_guid>
   static base::string16 GetActiveSetupPath(BrowserDistribution* dist);