UMA stats to count RenderFrameProxyHosts

content/browser/frame_host/render_frame_host_manager.cc

 // Copyright 2013 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.
 
 #include "content/browser/frame_host/render_frame_host_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 2318 matching lines @@
 }
 
 RenderFrameProxyHost* RenderFrameHostManager::GetRenderFrameProxyHost(
     SiteInstance* instance) const {
   auto it = proxy_hosts_.find(instance->GetId());
   if (it != proxy_hosts_.end())
     return it->second;
   return nullptr;
 }
 
+int RenderFrameHostManager::GetProxyCount() {
+  return proxy_hosts_.size();
+}
+
 std::map<int, RenderFrameProxyHost*>
 RenderFrameHostManager::GetAllProxyHostsForTesting() {
   std::map<int, RenderFrameProxyHost*> result;
   for (const auto& pair : proxy_hosts_)
     result[pair.first] = pair.second;
   return result;
 }
 
 void RenderFrameHostManager::CollectOpenerFrameTrees(
     std::vector<FrameTree*>* opener_frame_trees,
@@ skipping 131 matching lines @@
 int RenderFrameHostManager::GetOpenerRoutingID(SiteInstance* instance) {
   if (!frame_tree_node_->opener())
     return MSG_ROUTING_NONE;
 
   return frame_tree_node_->opener()
       ->render_manager()
       ->GetRoutingIdForSiteInstance(instance);
 }
 
 }  // namespace content