Extract debugger target enumeration into a separate class

content/public/browser/devtools_target_list.cc

Index: content/public/browser/devtools_target_list.cc
diff --git a/content/public/browser/devtools_target_list.cc b/content/public/browser/devtools_target_list.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a469d7de002a8b948b454e3de8eee434aa40a656
--- /dev/null
+++ b/content/public/browser/devtools_target_list.cc
@@ -0,0 +1,70 @@
+// 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.
+
+#include "content/public/browser/devtools_target_list.h"
+
+#include "base/memory/singleton.h"
+#include "base/values.h"
+#include "content/public/browser/devtools_agent_host.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+
+namespace content {
+
+DevToolsTargetList* DevToolsTargetList::GetInstance() {
+  return Singleton<DevToolsTargetList>::get();
+}
+
+void DevToolsTargetList::Refresh() {
+  GarbageCollect();
+
+  for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
+       !it.IsAtEnd(); it.Advance()) {
+    RenderProcessHost* render_process_host = it.GetCurrentValue();
+    DCHECK(render_process_host);
+
+    // Ignore processes that don't have a connection, such as crashed contents.
+    if (!render_process_host->HasConnection())
+      continue;
+
+    RenderProcessHost::RenderWidgetHostsIterator rwit(
+        render_process_host->GetRenderWidgetHostsIterator());
+    for (; !rwit.IsAtEnd(); rwit.Advance()) {
+      const RenderWidgetHost* widget = rwit.GetCurrentValue();
+      DCHECK(widget);
+      if (!widget || !widget->IsRenderView())
+        continue;
+
+      RenderViewHost* rvh =
+          RenderViewHost::From(const_cast<RenderWidgetHost*>(widget));
+      scoped_refptr<DevToolsAgentHost> agent(DevToolsAgentHost::GetFor(rvh));
+      agents_map_[agent->id()] = agent;
+    }
+  }
+}
+
+void DevToolsTargetList::Register(DevToolsAgentHost* agent_host) {
+  GarbageCollect();
+  agents_map_[agent_host->id()] = agent_host;
+}
+
+DevToolsAgentHost* DevToolsTargetList::Lookup(const std::string& id) {
+  GarbageCollect();
+  AgentsMap::iterator it = agents_map_.find(id);
+  if (it != agents_map_.end())
+    return it->second;
+  return NULL;
+}
+
+void DevToolsTargetList::GarbageCollect() {
+  AgentsMap::iterator it = agents_map_.begin();
+  while (it != agents_map_.end()) {
+    if (!it->second->GetRenderViewHost())
+      agents_map_.erase(it++);
+    else
+      ++it;
+  }
+}
+
+}  // namespace content