Using API key specified from js

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"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/url_request/url_fetcher_delegate.h"
+#include "url/gurl.h"
 
 namespace google {
 namespace protobuf {
 class MessageLite;
 }
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 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&)>
       ResponseCallback;
 
-  // An id for testing url fetching.
-  static const int kUrlFetcherId = 1;
-
-  // The query parameter to send Apiary tracing tokens.
-  static const char kTracingTokenField[];
-
-  // Create a request to the Copresence server. |url_context_getter|
-  // is owned by the caller, and the context it provides must be available
-  // until the request completes.
+  // Create a request to the Copresence server.
+  // |url_context_getter| is owned by the caller,
+  // and the context it provides must be available until the request completes.
   HttpPost(net::URLRequestContextGetter* url_context_getter,
            const std::string& server_host,
-           const std::string& rpc_name,
-           const std::string& tracing_token,
-           const google::protobuf::MessageLite& request_proto);
+           const std::string& rpc_name);
 
   // HTTP requests are cancelled on delete.
   virtual ~HttpPost();
 
+  // Add an Apiary tracing token to the request.
+  void set_tracing_token(const std::string& tracing_token);
+
+  // Add an API key to the request. If none is specified,
+  // we attempt to use Chrome's key.
+  void set_api_key(const std::string& api_key) { api_key_ = api_key; }
+
   // Send an HttpPost request.
-  void Start(const ResponseCallback& response_callback);
+  void Start(const ResponseCallback& response_callback,
+             const google::protobuf::MessageLite& request_proto);
 
  private:
+  static const int kUrlFetcherId = 1;
+  static const char kApiKeyField[];
+  static const char kTracingTokenField[];
+
+  friend class HttpPostTest;
+
   // Overridden from net::URLFetcherDelegate.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
+  net::URLRequestContextGetter* url_context_getter_;
+  GURL url_;
+
   ResponseCallback response_callback_;
+
   scoped_ptr<net::URLFetcher> url_fetcher_;
+  std::string api_key_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpPost);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_