Using API key specified from js

components/copresence/rpc/http_post.h

Index: components/copresence/rpc/http_post.h
diff --git a/components/copresence/rpc/http_post.h b/components/copresence/rpc/http_post.h
index c4c6e7f46943f137869f207f884c652daeabe26f..0df9585239fc821a5d149da0f463a788e54df289 100644
--- a/components/copresence/rpc/http_post.h
+++ b/components/copresence/rpc/http_post.h
@@ -11,6 +11,7 @@
 #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 {
@@ -36,33 +37,44 @@ class HttpPost : public net::URLFetcherDelegate {
   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);
 };