[DevTools] Implement DevToolsManager::Observer which notifies about target updates.

content/browser/devtools/render_view_devtools_agent_host.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/render_view_devtools_agent_host.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/child_process_security_policy_impl.h"
@@ skipping 105 matching lines @@
       reattaching_(false) {
   SetRenderViewHost(rvh);
   DevToolsProtocol::Notifier notifier(base::Bind(
       &RenderViewDevToolsAgentHost::OnDispatchOnInspectorFrontend,
       base::Unretained(this)));
   overrides_handler_->SetNotifier(notifier);
   tracing_handler_->SetNotifier(notifier);
   power_handler_->SetNotifier(notifier);
   g_instances.Get().push_back(this);
   AddRef();  // Balanced in RenderViewHostDestroyed.
+  DevToolsManager::GetInstance()->AgentHostChanged(this);
 }
 
 WebContents* RenderViewDevToolsAgentHost::GetWebContents() {
   return web_contents();
 }
 
 void RenderViewDevToolsAgentHost::DispatchProtocolMessage(
     const std::string& message) {
   std::string error_message;
 
@@ skipping 147 matching lines @@
 }
 
 void RenderViewDevToolsAgentHost::RenderViewDeleted(RenderViewHost* rvh) {
   if (rvh != render_view_host_)
     return;
 
   DCHECK(render_view_host_);
   scoped_refptr<RenderViewDevToolsAgentHost> protect(this);
   HostClosed();
   ClearRenderViewHost();
+  DevToolsManager::GetInstance()->AgentHostChanged(this);
   Release();
 }
 
 void RenderViewDevToolsAgentHost::RenderProcessGone(
     base::TerminationStatus status) {
   switch(status) {
     case base::TERMINATION_STATUS_ABNORMAL_TERMINATION:
     case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
     case base::TERMINATION_STATUS_PROCESS_CRASHED:
 #if defined(OS_ANDROID)
@@ skipping 29 matching lines @@
   if (!web_contents)
     return;
   DisconnectRenderViewHost();
   ConnectRenderViewHost(web_contents->GetRenderViewHost());
 }
 
 void RenderViewDevToolsAgentHost::DidDetachInterstitialPage() {
   overrides_handler_->DidDetachInterstitialPage();
 }
 
+void RenderViewDevToolsAgentHost::TitleWasSet(
+    NavigationEntry* entry, bool explicit_set) {
+  DevToolsManager::GetInstance()->AgentHostChanged(this);
+}
+
+void RenderViewDevToolsAgentHost::NavigationEntryCommitted(
+    const LoadCommittedDetails& load_details) {
+  DevToolsManager::GetInstance()->AgentHostChanged(this);
+}
+
 void RenderViewDevToolsAgentHost::Observe(int type,
                                           const NotificationSource& source,
                                           const NotificationDetails& details) {
   if (type == content::NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED) {
     bool visible = *Details<bool>(details).ptr();
     overrides_handler_->OnVisibilityChanged(visible);
   }
 }
 
 void RenderViewDevToolsAgentHost::SetRenderViewHost(RenderViewHost* rvh) {
@@ skipping 119 matching lines @@
 }
 
 void RenderViewDevToolsAgentHost::OnDispatchOnInspectorFrontend(
     const std::string& message) {
   if (!render_view_host_)
     return;
   SendMessageToClient(message);
 }
 
 }  // namespace content