Add UMA for number of outstanding requests in ResourceDispatcherHostImpl

content/browser/loader/resource_dispatcher_host_impl.h

 // Copyright (c) 2012 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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 724 matching lines @@
 
   // |max_outstanding_requests_cost_per_process_| is the upper bound on how
   // many outstanding requests can be issued per child process host.
   // The constraint is expressed in terms of bytes (where the cost of
   // individual requests is given by CalculateApproximateMemoryCost).
   // The total number of outstanding requests is roughly:
   //   (max_outstanding_requests_cost_per_process_ /
   //       kAvgBytesPerOutstandingRequest)
   int max_outstanding_requests_cost_per_process_;
 
+  // Largest number of outstanding requests seen so far across all processes.
+  int largest_outstanding_request_count_seen_;
+
+  // Largest number of outstanding requests seen so far in any single process.
+  int largest_outstanding_request_per_process_count_seen_;
+
   // Time of the last user gesture. Stored so that we can add a load
   // flag to requests occurring soon after a gesture to indicate they
   // may be because of explicit user action.
   base::TimeTicks last_user_gesture_time_;
 
   ResourceDispatcherHostDelegate* delegate_;
 
   LoaderDelegate* loader_delegate_;
 
   bool allow_cross_origin_auth_prompt_;
@@ skipping 15 matching lines @@
 
   // Task runner for the IO thead.
   scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_