Generate snippets request JSON with base::Value.

components/ntp_snippets/ntp_snippets_fetcher.h

 // Copyright 2016 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_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_
 #define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 98 matching lines @@
   bool UsesHostRestrictions() const;
   // Does the fetcher use authentication to get personalized results?
   bool UsesAuthentication() const;
 
   // Overrides internal clock for testing purposes.
   void SetTickClockForTesting(std::unique_ptr<base::TickClock> tick_clock) {
     tick_clock_ = std::move(tick_clock);
   }
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(NTPSnippetsFetcherTest, BuildRequestAuthenticated);
+  FRIEND_TEST_ALL_PREFIXES(NTPSnippetsFetcherTest, BuildRequestUnauthenticated);
+
+  static std::string BuildRequest(const std::string& obfuscated_gaia_id,
+                                  bool only_return_personalized_results,
+                                  const std::string& user_segment,
+                                  const std::set<std::string>& host_restricts,
+                                  int count_to_fetch);
+
   void FetchSnippetsImpl(const GURL& url,
                          const std::string& auth_header,
                          const std::string& request);
-  std::string GetHostRestricts() const;
   void FetchSnippetsNonAuthenticated();
   void FetchSnippetsAuthenticated(const std::string& account_id,
                                   const std::string& oauth_access_token);
   void StartTokenRequest();
 
   // OAuth2TokenService::Consumer overrides:
   void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                          const std::string& access_token,
                          const base::Time& expiration_time) override;
   void OnGetTokenFailure(const OAuth2TokenService::Request* request,
@@ skipping 51 matching lines @@
   // Allow for an injectable tick clock for testing.
   std::unique_ptr<base::TickClock> tick_clock_;
 
   base::WeakPtrFactory<NTPSnippetsFetcher> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsFetcher);
 };
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_