[Cronet] Purge storage directory if version does not match

components/cronet/url_request_context_config.cc

 // Copyright 2014 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.
 
 #include "components/cronet/url_request_context_config.h"
 
 #include <utility>
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
@@ skipping 258 matching lines @@
 
 void URLRequestContextConfig::ConfigureURLRequestContextBuilder(
     net::URLRequestContextBuilder* context_builder,
     net::NetLog* net_log,
     const scoped_refptr<base::SequencedTaskRunner>& file_task_runner) {
   std::string config_cache;
   if (http_cache != DISABLED) {
     net::URLRequestContextBuilder::HttpCacheParams cache_params;
     if (http_cache == DISK && !storage_path.empty()) {
       cache_params.type = net::URLRequestContextBuilder::HttpCacheParams::DISK;
-      cache_params.path = base::FilePath(storage_path);
+      cache_params.path =
+          base::FilePath(storage_path).Append(FILE_PATH_LITERAL("disk_cache"));
     } else {
       cache_params.type =
           net::URLRequestContextBuilder::HttpCacheParams::IN_MEMORY;
     }
     cache_params.max_size = http_cache_max_size;
     context_builder->EnableHttpCache(cache_params);
   } else {
     context_builder->DisableHttpCache();
   }
   context_builder->set_user_agent(user_agent);
   context_builder->SetSpdyAndQuicEnabled(enable_spdy, enable_quic);
   context_builder->set_sdch_enabled(enable_sdch);
   if (enable_quic)
     context_builder->set_quic_user_agent_id(quic_user_agent_id);
 
   ParseAndSetExperimentalOptions(experimental_options, context_builder, net_log,
                                  file_task_runner);
 
   if (mock_cert_verifier)
     context_builder->SetCertVerifier(std::move(mock_cert_verifier));
   // TODO(mef): Use |config| to set cookies.
 }
 
 }  // namespace cronet