[Variations] Bring variations_http_header_provider to variations component

components/variations/variations_http_header_provider.cc

Index: components/variations/variations_http_header_provider.cc
diff --git a/chrome/browser/metrics/variations/variations_http_header_provider.cc b/components/variations/variations_http_header_provider.cc
similarity index 95%
rename from chrome/browser/metrics/variations/variations_http_header_provider.cc
rename to components/variations/variations_http_header_provider.cc
index d45c1c4068719f1c8b7c27591a1d15da2a69a36a..3cce027b0e034a4ba6ed10e48793f56207b9dd77 100644
--- a/chrome/browser/metrics/variations/variations_http_header_provider.cc
+++ b/components/variations/variations_http_header_provider.cc
@@ -2,7 +2,7 @@
 // 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>
 
@@ -12,13 +12,19 @@
 #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 {
 
@@ -256,4 +262,4 @@ bool VariationsHttpHeaderProvider::ShouldAppendHeaders(const GURL& url) {
                                          google_util::ALLOW_NON_STANDARD_PORTS);
 }
 
-}  // namespace chrome_variations
+}  // namespace variations