Remove ProxyResolver::(Cancel)SetPacScript and LegacyProxyResolverFactory.

net/proxy/proxy_resolver_winhttp.cc

Index: net/proxy/proxy_resolver_winhttp.cc
diff --git a/net/proxy/proxy_resolver_winhttp.cc b/net/proxy/proxy_resolver_winhttp.cc
index f7193d16a5f2ec4865caa8d934820a42742007e6..193fd988118cae3fbb8920a100a7250fb8c58e2a 100644
--- a/net/proxy/proxy_resolver_winhttp.cc
+++ b/net/proxy/proxy_resolver_winhttp.cc
@@ -46,11 +46,6 @@ class ProxyResolverWinHttp : public ProxyResolver {
 
   LoadState GetLoadState(RequestHandle request) const override;
 
-  void CancelSetPacScript() override;
-
-  int SetPacScript(const scoped_refptr<ProxyResolverScriptData>& script_data,
-                   const CompletionCallback& /*callback*/) override;
-
  private:
   bool OpenWinHttpSession();
   void CloseWinHttpSession();
@@ -65,8 +60,7 @@ class ProxyResolverWinHttp : public ProxyResolver {
 
 ProxyResolverWinHttp::ProxyResolverWinHttp(
     const scoped_refptr<ProxyResolverScriptData>& script_data)
-    : ProxyResolver(false /*expects_pac_bytes*/),
-      session_handle_(NULL),
+    : session_handle_(NULL),
       pac_url_(script_data->type() == ProxyResolverScriptData::TYPE_AUTO_DETECT
                    ? GURL("http://wpad/wpad.dat")
                    : script_data->url()) {
@@ -169,17 +163,6 @@ LoadState ProxyResolverWinHttp::GetLoadState(RequestHandle request) const {
   return LOAD_STATE_IDLE;
 }
 
-void ProxyResolverWinHttp::CancelSetPacScript() {
-  NOTREACHED();
-}
-
-int ProxyResolverWinHttp::SetPacScript(
-    const scoped_refptr<ProxyResolverScriptData>& script_data,
-    const CompletionCallback& /*callback*/) {
-  NOTREACHED();
-  return ERR_NOT_IMPLEMENTED;
-}
-
 bool ProxyResolverWinHttp::OpenWinHttpSession() {
   DCHECK(!session_handle_);
   session_handle_ = WinHttpOpen(NULL,