[Variations] Bring variations_http_header_provider to variations component

components/variations/variations_http_header_provider.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/metrics/variations/variations_http_header_provider.h"
+#include "components/variations/variations_http_header_provider.h"
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
-#include "chrome/browser/metrics/variations/proto/chrome_experiments.pb.h"
 #include "components/google/core/browser/google_util.h"
+#include "components/variations/proto/chrome_experiments.pb.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/http/http_request_headers.h"
 #include "url/gurl.h"
 
-namespace chrome_variations {
+// TODO(mathp): Once the move to variations namespace is complete, remove these.
+using chrome_variations::EMPTY_ID;
+using chrome_variations::GOOGLE_WEB_PROPERTIES;
+using chrome_variations::GOOGLE_WEB_PROPERTIES_TRIGGER;
+using chrome_variations::VariationID;
+
+namespace variations {
 
 namespace {
 
 const char* kSuffixesToSetHeadersFor[] = {
   ".android.com",
   ".doubleclick.com",
   ".doubleclick.net",
   ".ggpht.com",
   ".googleadservices.com",
   ".googleapis.com",
@@ skipping 217 matching lines @@
   const std::string host = url.host();
   for (size_t i = 0; i < arraysize(kSuffixesToSetHeadersFor); ++i) {
     if (EndsWith(host, kSuffixesToSetHeadersFor[i], false))
       return true;
   }
 
   return google_util::IsYoutubeDomainUrl(url, google_util::ALLOW_SUBDOMAIN,
                                          google_util::ALLOW_NON_STANDARD_PORTS);
 }
 
-}  // namespace chrome_variations
+}  // namespace variations