Add data reduction functionality to all platforms.

chrome/browser/android/intercept_download_resource_throttle.cc

 // 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.
 
 #include "chrome/browser/android/intercept_download_resource_throttle.h"
 
 #include "components/data_reduction_proxy/common/data_reduction_proxy_headers.h"
 #include "content/public/browser/android/download_controller_android.h"
 #include "content/public/browser/resource_controller.h"
 #include "net/http/http_request_headers.h"
@@ skipping 30 matching lines @@
 
 void InterceptDownloadResourceThrottle::ProcessDownloadRequest() {
   if (request_->method() != net::HttpRequestHeaders::kGetMethod)
     return;
 
   // In general, if the request uses HTTP authorization, either with the origin
   // or a proxy, then the network stack should handle the download. The one
   // exception is a request that is fetched via the Chrome Proxy and does not
   // authenticate with the origin.
   if (request_->response_info().did_use_http_auth) {
-#if defined(SPDY_PROXY_AUTH_ORIGIN)

[bengr, 2014/07/11 20:42:53]

Currently, Android apps built from solely the chromium code will not have
authentication credentials. If you remove these #ifdefs, then you must also not
configure the data reduction proxy if the key is not set.

[Not at Google. Contact bengr, 2014/07/16 22:41:33]

Discussed in person. Let's do the configuration regardless of the key. We could
remove the UI which allows DRP to be switched on if key is absent.

     net::HttpRequestHeaders headers;
     request_->GetFullRequestHeaders(&headers);
     if (headers.HasHeader(net::HttpRequestHeaders::kAuthorization) ||
         !(request_->response_info().headers &&
             data_reduction_proxy::HasDataReductionProxyViaHeader(
                 request_->response_info().headers))) {
       return;
     }
-#else
-    return;
-#endif
+
   }
 
   if (request_->url_chain().empty())
     return;
 
   GURL url = request_->url_chain().back();
   if (!url.SchemeIsHTTPOrHTTPS())
     return;
 
   content::DownloadControllerAndroid::Get()->CreateGETDownload(
       render_process_id_, render_view_id_, request_id_);
   controller()->Cancel();
 }
 
 }  // namespace chrome