Add audible support to the copresence API.

components/copresence/rpc/http_post.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_COPRESENCE_RPC_HTTP_POST_H_
 #define COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 14 matching lines @@
 namespace copresence {
 
 // This class handles all Apiary calls to the Copresence server.
 // It configures the HTTP request appropriately and reports any errors.
 // If deleted, the HTTP request is cancelled.
 //
 // TODO(ckehoe): Add retry logic.
 class HttpPost : public net::URLFetcherDelegate {
  public:
   // Callback to receive the HTTP status code and body of the response
-  // (if any). A pointer to this HttpPost object is also passed along.
-  typedef base::Callback<void(int, const std::string&, HttpPost*)>
-      ResponseCallback;
+  // (if any).
+  typedef base::Callback<void(int, const std::string&)> ResponseCallback;
 
   // An id for testing url fetching.
   static const int kUrlFetcherId = 1;
 
   // Send a request to the Copresence server. After calling the callback, this
   // object will delete itself. |url_context_getter| is owned by the caller,
   // and the context it provides must be available until the request completes.
   // If this context is being destructed, call Cancel().
   HttpPost(net::URLRequestContextGetter* url_context_getter,
            const std::string& server_host,
            const std::string& rpc_name,
-           const google::protobuf::MessageLite& request_proto,
-           const ResponseCallback& response_callback);
+           const google::protobuf::MessageLite& request_proto);
+
+  void Start(const ResponseCallback& response_callback);
 
   // HTTP requests are cancelled on delete.
   virtual ~HttpPost();
 
  private:
   // Overridden from net::URLFetcherDelegate.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
   ResponseCallback response_callback_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpPost);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_