Remove redundant DevToolsManager methods and clean up its clients.

content/browser/devtools/devtools_agent_host_impl.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/browser/devtools/devtools_agent_host_impl.h"
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/guid.h"
 #include "base/lazy_instance.h"
+#include "content/browser/devtools/devtools_manager_impl.h"
 
 namespace content {
 
 namespace {
 typedef std::map<std::string, DevToolsAgentHostImpl*> Instances;
 base::LazyInstance<Instances>::Leaky g_instances = LAZY_INSTANCE_INITIALIZER;
 }  // namespace
 
 DevToolsAgentHostImpl::DevToolsAgentHostImpl()
     : close_listener_(NULL),
       id_(base::GenerateGUID()) {
   g_instances.Get()[id_] = this;
 }
 
 DevToolsAgentHostImpl::~DevToolsAgentHostImpl() {
   g_instances.Get().erase(g_instances.Get().find(id_));
 }
 
 scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::GetForId(
     const std::string& id) {
   if (g_instances == NULL)
     return NULL;
   Instances::iterator it = g_instances.Get().find(id);
   if (it == g_instances.Get().end())
     return NULL;
   return it->second;
 }
 
+bool DevToolsAgentHostImpl::IsAttached() {
+  return !!DevToolsManagerImpl::GetInstance()->GetDevToolsClientHostFor(this);
+}
+
 void DevToolsAgentHostImpl::InspectElement(int x, int y) {
 }
 
 std::string DevToolsAgentHostImpl::GetId() {
   return id_;
 }
 
 RenderViewHost* DevToolsAgentHostImpl::GetRenderViewHost() {
   return NULL;
 }
 
 void DevToolsAgentHostImpl::NotifyCloseListener() {
   if (close_listener_) {
     scoped_refptr<DevToolsAgentHostImpl> protect(this);
     close_listener_->AgentHostClosing(this);
     close_listener_ = NULL;
   }
 }
 
 }  // namespace content