Add option to suppress HTTP Referer header.

chrome/browser/renderer_host/resource_dispatcher_host.cc

Index: chrome/browser/renderer_host/resource_dispatcher_host.cc
diff --git a/chrome/browser/renderer_host/resource_dispatcher_host.cc b/chrome/browser/renderer_host/resource_dispatcher_host.cc
index b92c6a99d7af4fc4f80cdf2fcc0c5ccb80ee09af..48854236d205b69577bf362caabda47d55acae36 100644
--- a/chrome/browser/renderer_host/resource_dispatcher_host.cc
+++ b/chrome/browser/renderer_host/resource_dispatcher_host.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -379,7 +379,8 @@ void ResourceDispatcherHost::BeginRequest(
   URLRequest* request = new URLRequest(request_data.url, this);
   request->set_method(request_data.method);
   request->set_first_party_for_cookies(request_data.first_party_for_cookies);
-  request->set_referrer(request_data.referrer.spec());
+  request->set_referrer(CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kNoReferrers) ? std::string() : request_data.referrer.spec());
   request->SetExtraRequestHeaders(request_data.headers);
 
   int load_flags = request_data.load_flags;
@@ -615,7 +616,8 @@ void ResourceDispatcherHost::BeginDownload(
   }
 
   request->set_method("GET");
-  request->set_referrer(referrer.spec());
+  request->set_referrer(CommandLine::ForCurrentProcess()->HasSwitch(

[darin (slow to review), 2010/02/10 07:20:41]

i think this duplication of code is unfortunate.  we should ideally have a
function that is used to initialize an URLRequest that can be shared.  this
doesn't have to be part of this CL, but if you were inclined to do such
refactoring that'd be great :)

+      switches::kNoReferrers) ? std::string() : referrer.spec());
   request->set_context(request_context);
   request->set_load_flags(request->load_flags() |
       net::LOAD_IS_DOWNLOAD);
@@ -671,7 +673,8 @@ void ResourceDispatcherHost::BeginSaveFile(const GURL& url,
 
   URLRequest* request = new URLRequest(url, this);
   request->set_method("GET");
-  request->set_referrer(referrer.spec());
+  request->set_referrer(CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kNoReferrers) ? std::string() : referrer.spec());
   // So far, for saving page, we need fetch content from cache, in the
   // future, maybe we can use a configuration to configure this behavior.
   request->set_load_flags(net::LOAD_PREFERRING_CACHE);