Fix a bug where the inspector would not keep event pages alive.

content/browser/debugger/devtools_manager_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/debugger/devtools_manager_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
@@ skipping 86 matching lines @@
                                          int x, int y) {
   agent_host->InspectElement(x, y);
 }
 
 void DevToolsManagerImpl::AddMessageToConsole(DevToolsAgentHost* agent_host,
                                               ConsoleMessageLevel level,
                                               const std::string& message) {
   agent_host->AddMessageToConsole(level, message);
 }
 
+void DevToolsManagerImpl::ClientHostOpening(DevToolsClientHost* client_host) {
+  DevToolsAgentHost* agent_host = GetDevToolsAgentHostFor(client_host);
+  if (agent_host)
+    agent_host->NotifyClientOpening();
+}
+
 void DevToolsManagerImpl::ClientHostClosing(DevToolsClientHost* client_host) {
   DevToolsAgentHost* agent_host = GetDevToolsAgentHostFor(client_host);
   if (!agent_host) {
     // It might be in the list of orphan client hosts, remove it from there.
     for (OrphanClientHosts::iterator it = orphan_client_hosts_.begin();
          it != orphan_client_hosts_.end(); ++it) {
       if (it->second.first == client_host) {
         orphan_client_hosts_.erase(it->first);
         return;
       }
@@ skipping 178 matching lines @@
        it != agent_to_client_host_.end(); ++it) {
     agents.push_back(it->first);
   }
   for (std::vector<DevToolsAgentHost*>::iterator it = agents.begin();
        it != agents.end(); ++it) {
     UnregisterDevToolsClientHostFor(*it);
   }
 }
 
 }  // namespace content