Include referrer chain with inline install requests.

chrome/browser/extensions/webstore_data_fetcher.h

 // Copyright 2013 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 CHROME_BROWSER_EXTENSIONS_WEBSTORE_DATA_FETCHER_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_DATA_FETCHER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 19 matching lines @@
 // DictionaryValue.
 class WebstoreDataFetcher : public base::SupportsWeakPtr<WebstoreDataFetcher>,
                             public net::URLFetcherDelegate {
  public:
   WebstoreDataFetcher(WebstoreDataFetcherDelegate* delegate,
                       net::URLRequestContextGetter* request_context,
                       const GURL& referrer_url,
                       const std::string webstore_item_id);
   ~WebstoreDataFetcher() override;
 
+  // Makes this request use a POST instead of GET, and sends |json| in the
+  // body of the request. If |json| is empty, this is a no-op.
+  void SetJsonPostData(const std::string& json);
+
   void Start();
 
   void set_max_auto_retries(int max_retries) {
     max_auto_retries_ = max_retries;
   }
 
  private:
   void OnJsonParseSuccess(std::unique_ptr<base::Value> parsed_json);
   void OnJsonParseFailure(const std::string& error);
 
   // net::URLFetcherDelegate overrides:
   void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   WebstoreDataFetcherDelegate* delegate_;
   net::URLRequestContextGetter* request_context_;
   GURL referrer_url_;
   std::string id_;
+  std::string json_post_data_;
 
   // For fetching webstore JSON data.
   std::unique_ptr<net::URLFetcher> webstore_data_url_fetcher_;
 
   // Maximum auto retry times on server 5xx error or ERR_NETWORK_CHANGED.
   // Default is 0 which means to use the URLFetcher default behavior.
   int max_auto_retries_;
 
   DISALLOW_COPY_AND_ASSIGN(WebstoreDataFetcher);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_DATA_FETCHER_H_