Eliminate wstring from base/utf_offset_string_conversions.h, net/base/escape.h, and net/base/net_...

net/base/registry_controlled_domain.h

Index: net/base/registry_controlled_domain.h
===================================================================
--- net/base/registry_controlled_domain.h	(revision 82762)
+++ net/base/registry_controlled_domain.h	(working copy)
@@ -155,7 +155,6 @@
   // Like the GURL version, but takes a host (which is canonicalized internally)
   // instead of a full GURL.
   static std::string GetDomainAndRegistry(const std::string& host);
-  static std::string GetDomainAndRegistry(const std::wstring& host);
 
   // This convenience function returns true if the two GURLs both have hosts
   // and one of the following is true:
@@ -195,8 +194,6 @@
   // instead of a full GURL.
   static size_t GetRegistryLength(const std::string& host,
                                   bool allow_unknown_registries);
-  static size_t GetRegistryLength(const std::wstring& host,
-                                  bool allow_unknown_registries);
 
   // Returns the singleton instance, after attempting to initialize it.
   // NOTE that if the effective-TLD data resource can't be found, the instance