Extract debugger target enumeration into a separate class

content/public/browser/devtools_target_list.cc

+// 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/stringprintf.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();
+}
+
+DevToolsTargetList::AgentsMap& DevToolsTargetList::GetAgentsMap() {
+  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));
+      BindDevToolsAgentHost(DevToolsAgentHost::GetFor(rvh));
+    }
+  }
+  return agents_map_;
+}
+
+std::string DevToolsTargetList::GetIdentifier(DevToolsAgentHost* agent_host) {
+  GarbageCollect();
+  return BindDevToolsAgentHost(agent_host);
+}
+
+DevToolsAgentHost* DevToolsTargetList::ForIdentifier(const std::string& id) {
+  GarbageCollect();
+  AgentsMap::iterator it = agents_map_.find(id);
+  if (it != agents_map_.end())
+    return it->second;
+  return NULL;
+}
+
+std::string DevToolsTargetList::BindDevToolsAgentHost(
+    DevToolsAgentHost* agent_host) {
+  std::string id = base::StringPrintf("%d", agent_host->id());

[pfeldman, 2013/03/01 14:28:17]

Lets stick to either int or string in both: DevToolsAgentHost and
DevToolsTargetList. No preference from me, integer is easier to increment,
string is more debuggable.

[Vladislav Kaznacheev, 2013/03/01 16:16:38]

Changed to string everywhere.
On 2013/03/01 14:28:17, pfeldman wrote:

+  agents_map_[id] = agent_host;
+  return id;
+}
+
+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