[Variations] Renaming ChromeVariations to ClientVariations.

components/variations/variations_http_header_provider.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_VARIATIONS_VARIATIONS_HTTP_HEADER_PROVIDER_H_
 #define COMPONENTS_VARIATIONS_VARIATIONS_HTTP_HEADER_PROVIDER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 10 matching lines @@
 namespace net {
 class HttpRequestHeaders;
 }
 
 class GURL;
 
 template <typename T> struct DefaultSingletonTraits;
 
 namespace variations {
 
-// A helper class for maintaining Chrome experiments and metrics state
+// A helper class for maintaining Client experiments and metrics state

[Alexei Svitkine (slow), 2014/07/14 19:43:20]

Nit: lowercase

[Mathieu, 2014/07/14 19:50:16]

Done.

 // transmitted in custom HTTP request headers.
 // This class is a thread-safe singleton.
 class VariationsHttpHeaderProvider : base::FieldTrialList::Observer {
  public:
   static VariationsHttpHeaderProvider* GetInstance();
 
   // Adds Chrome experiment and metrics state as custom headers to |headers|.
   // Some headers may not be set given the |incognito| mode or whether
   // the user has |uma_enabled|.  Also, we never transmit headers to non-Google
   // sites, which is checked based on the destination |url|.
@@ skipping 62 matching lines @@
   std::set<chrome_variations::VariationID> default_trigger_id_set_;
 
   std::string variation_ids_header_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsHttpHeaderProvider);
 };
 
 }  // namespace variations
 
 #endif  // COMPONENTS_VARIATIONS_VARIATIONS_HTTP_HEADER_PROVIDER_H_