Remove Render.Workers.MaxWorkerCountInRendererProcess UMA.

content/browser/renderer_host/render_process_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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 405 matching lines @@
   }
 
   std::string child_token_;
 
   std::unique_ptr<ChildConnection> child_connection_;
   int connection_filter_id_ =
       ServiceManagerConnection::kInvalidConnectionFilterId;
   scoped_refptr<ConnectionFilterController> connection_filter_controller_;
   service_manager::mojom::ServicePtr test_service_;
 
+  // The number of service workers running in this process.
   size_t service_worker_ref_count_;
+  // See comments for IncrementSharedWorkerRefCount() and
+  // DecrementSharedWorkerRefCount(). This is more like a boolean flag and not
+  // actually the number of shared workers running in this process.
   size_t shared_worker_ref_count_;
 
   // Set in ForceReleaseWorkerRefCounts. When true, worker ref counts must no
   // longer be modified.
   bool is_worker_ref_count_disabled_;
 
   // The registered IPC listener objects. When this list is empty, we should
   // delete ourselves.
   IDMap<IPC::Listener*> listeners_;
 
@@ skipping 109 matching lines @@
 
   // Forwards messages between WebRTCInternals in the browser process
   // and PeerConnectionTracker in the renderer process.
   // It holds a raw pointer to webrtc_eventlog_host_, and therefore should be
   // defined below it so it is destructed first.
   scoped_refptr<PeerConnectionTrackerHost> peer_connection_tracker_host_;
 
   // Records the time when the process starts surviving for workers for UMA.
   base::TimeTicks survive_for_worker_start_time_;
 
-  // Records the maximum # of workers simultaneously hosted in this process
-  // for UMA.
-  size_t max_worker_count_;
-
   // Context shared for each mojom::PermissionService instance created for this
   // RPH.
   std::unique_ptr<PermissionServiceContext> permission_service_context_;
 
   // The memory allocator, if any, in which the renderer will write its metrics.
   std::unique_ptr<base::SharedPersistentMemoryAllocator> metrics_allocator_;
 
   bool channel_connected_;
   bool sent_render_process_ready_;
 
@@ skipping 18 matching lines @@
       instance_weak_factory_;
 
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_