[DevTools] Fix out of process iframes not working on chrome://inspect.

chrome/browser/devtools/chrome_devtools_manager_delegate.cc

 // Copyright 2014 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 "chrome/browser/devtools/chrome_devtools_manager_delegate.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/devtools/devtools_network_protocol_handler.h"
 #include "chrome/browser/devtools/devtools_window.h"
@@ skipping 31 matching lines @@
   Profile* profile =
       Profile::FromBrowserContext(agent_host->GetBrowserContext());
   if (!profile)
     return;
   std::string type = agent_host->GetType();
   if (type == content::DevToolsAgentHost::kTypeSharedWorker ||
       type == content::DevToolsAgentHost::kTypeServiceWorker) {
     DevToolsWindow::OpenDevToolsWindowForWorker(profile, agent_host);
     return;
   }
+  if (type == content::DevToolsAgentHost::kTypeFrame) {
+    DevToolsWindow::OpenDevToolsWindow(profile, agent_host);
+    return;
+  }
   content::WebContents* web_contents = agent_host->GetWebContents();
   if (web_contents)
     DevToolsWindow::OpenDevToolsWindow(web_contents);
 }
 
 base::DictionaryValue* ChromeDevToolsManagerDelegate::HandleCommand(
     content::DevToolsAgentHost* agent_host,
     base::DictionaryValue* command_dict) {
   return network_protocol_handler_->HandleCommand(agent_host, command_dict);
 }
@@ skipping 80 matching lines @@
 std::string ChromeDevToolsManagerDelegate::GetFrontendResource(
     const std::string& path) {
   return content::DevToolsFrontendHost::GetFrontendResource(path).as_string();
 }
 
 void ChromeDevToolsManagerDelegate::DevToolsAgentStateChanged(
     content::DevToolsAgentHost* agent_host,
     bool attached) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, attached);
 }