[Android WebView] Get rid of secondary HttpNetworkSession

net/url_request/url_request_context_builder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This class is useful for building a simple URLRequestContext. Most creators
 // of new URLRequestContexts should use this helper class to construct it. Call
 // any configuration params, and when done, invoke Build() to construct the
 // URLRequestContext. This URLRequestContext will own all its own storage.
 //
 // URLRequestContextBuilder and its associated params classes are initially
@@ skipping 34 matching lines @@
 class HttpAuthHandlerFactory;
 class HttpServerProperties;
 class ProxyConfigService;
 class URLRequestContext;
 class URLRequestInterceptor;
 
 class NET_EXPORT URLRequestContextBuilder {
  public:
   struct NET_EXPORT HttpCacheParams {
     enum Type {
+      // In-memory cache.
       IN_MEMORY,
+      // Disk cache using "default" backend.
       DISK,
+      // Disk cache using "simple" backend (SimpleBackendImpl).
+      DISK_SIMPLE,
     };
 
     HttpCacheParams();
     ~HttpCacheParams();
 
     // The type of HTTP cache. Default is IN_MEMORY.
     Type type;
 
     // The max size of the cache in bytes. Default is algorithmically determined
     // based off available disk space.
@@ skipping 206 matching lines @@
   scoped_ptr<CertVerifier> cert_verifier_;
   ScopedVector<URLRequestInterceptor> url_request_interceptors_;
   scoped_ptr<HttpServerProperties> http_server_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextBuilder);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_BUILDER_H_