[Cronet] Allow UrlRequest bypass cache

components/cronet/android/cronet_url_request_adapter.h

 // 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.
 
 #ifndef COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_
 #define COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 103 matching lines @@
   const std::string& GetNegotiatedProtocol() const;
 
   // Returns true if response is coming from the cache.
   bool GetWasCached() const;
 
   // Gets the total amount of body data received from network after
   // SSL/SPDY/QUIC decoding and proxy handling.  Basically the size of the body
   // prior to decompression.
   int64 GetTotalReceivedBytes() const;
 
+  // Bypasses cache. If context is not set up to use cache, this call has no
+  // effect.
+  void BypassCache();
+
   // net::URLRequest::Delegate overrides.
   void OnReceivedRedirect(net::URLRequest* request,
                           const net::RedirectInfo& redirect_info,
                           bool* defer_redirect) override;
   void OnResponseStarted(net::URLRequest* request) override;
   void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
 
  private:
   // Checks status of the request_adapter, return false if |is_success()| is
   // true, otherwise report error and cancel request_adapter.
   bool MaybeReportError(net::URLRequest* request) const;
 
   CronetURLRequestContextAdapter* context_;
   scoped_ptr<CronetURLRequestAdapterDelegate> delegate_;
 
   const GURL initial_url_;
   const net::RequestPriority initial_priority_;
   std::string initial_method_;
+  bool bypass_cache_;
   net::HttpRequestHeaders initial_request_headers_;
 
   scoped_refptr<net::IOBufferWithSize> read_buffer_;
   scoped_ptr<net::URLRequest> url_request_;
 
   DISALLOW_COPY_AND_ASSIGN(CronetURLRequestAdapter);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_