Revert of Allow use of Mojo/V8 ProxyResolvers with URLRequestContextBuilder.

net/url_request/url_request_context_builder.h

Index: net/url_request/url_request_context_builder.h
diff --git a/net/url_request/url_request_context_builder.h b/net/url_request/url_request_context_builder.h
index a622625766ebdcdf6892354b37a6fdf839f03618..2c0443789216832c01aa0262da29aa9fd820631f 100644
--- a/net/url_request/url_request_context_builder.h
+++ b/net/url_request/url_request_context_builder.h
@@ -112,7 +112,7 @@
   };
 
   URLRequestContextBuilder();
-  virtual ~URLRequestContextBuilder();
+  ~URLRequestContextBuilder();
 
   // Sets a name for this URLRequestContext. Currently the name is used in
   // MemoryDumpProvier to annotate memory usage. The name does not need to be
@@ -143,11 +143,6 @@
       std::unique_ptr<ProxyConfigService> proxy_config_service) {
     proxy_config_service_ = std::move(proxy_config_service);
   }
-
-  // Sets the proxy service. If one is not provided, by default, uses system
-  // libraries to evaluate PAC scripts, if available (And if not, skips PAC
-  // resolution). Subclasses may override CreateProxyService for different
-  // default behavior.
   void set_proxy_service(std::unique_ptr<ProxyService> proxy_service) {
     proxy_service_ = std::move(proxy_service);
   }
@@ -335,17 +330,6 @@
       std::unique_ptr<HttpServerProperties> http_server_properties);
 
   std::unique_ptr<URLRequestContext> Build();
-
- protected:
-  // Lets subclasses override ProxyService creation, using a ProxyService that
-  // uses the URLRequestContext itself to get PAC scripts. When this method is
-  // invoked, the URLRequestContext is not yet ready to service requests.
-  virtual std::unique_ptr<ProxyService> CreateProxyService(
-      std::unique_ptr<ProxyConfigService> proxy_config_service,
-      URLRequestContext* url_request_context,
-      HostResolver* host_resolver,
-      NetworkDelegate* network_delegate,
-      NetLog* net_log);
 
  private:
   const char* name_;