rlz: get rid of the call to AppendHeaderIfMissing()

components/rlz/rlz_tracker.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.
 //
 // This code glues the RLZ library DLL with Chrome. It allows Chrome to work
 // with or without the DLL being present. If the DLL is not present the
 // functions do nothing and just return false.
 
 #include "components/rlz/rlz_tracker.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "components/rlz/rlz_tracker_delegate.h"
-#include "net/http/http_util.h"
 
 namespace rlz {
 namespace {
 
 // Maximum and minimum delay for financial ping we would allow to be set through
 // master preferences. Somewhat arbitrary, may need to be adjusted in future.
 const base::TimeDelta kMaxInitDelay = base::TimeDelta::FromSeconds(200);
 const base::TimeDelta kMinInitDelay = base::TimeDelta::FromSeconds(20);
 
 void RecordProductEvents(bool first_run,
@@ skipping 404 matching lines @@
   return nullptr;
 }
 
 // static
 std::string RLZTracker::GetAccessPointHttpHeader(rlz_lib::AccessPoint point) {
   TRACE_EVENT0("RLZ", "RLZTracker::GetAccessPointHttpHeader");
   std::string extra_headers;
   base::string16 rlz_string;
   RLZTracker::GetAccessPointRlz(point, &rlz_string);
   if (!rlz_string.empty()) {
-    net::HttpUtil::AppendHeaderIfMissing("X-Rlz-String",
-                                         base::UTF16ToUTF8(rlz_string),
-                                         &extra_headers);
+    return base::StringPrintf("X-Rlz-String: %s\r\n",
+                              base::UTF16ToUTF8(rlz_string).c_str());
   }
 
   return extra_headers;
 }
 
 // GetAccessPointRlz() caches RLZ strings for all access points. If we had
 // a successful ping, then we update the cached value.
 // static
 bool RLZTracker::GetAccessPointRlz(rlz_lib::AccessPoint point,
                                    base::string16* rlz) {
@@ skipping 99 matching lines @@
   // This method is called during unit tests while the RLZTracker has not been
   // initialized, so check for the presence of a delegate and exit if there is
   // none registered.
   RLZTracker* tracker = GetInstance();
   if (tracker->delegate_)
     tracker->RecordFirstSearch(RLZTracker::ChromeAppList());
 }
 #endif
 
 }  // namespace rlz