Fix front-end host creation upon navigation

chrome/browser/ui/webui/chrome_web_ui_controller_factory.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 "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/about_flags.h"
+#include "chrome/browser/devtools/devtools_ui_bindings.h"
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 #include "chrome/browser/engagement/site_engagement_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/search/suggestions/suggestions_ui.h"
 #include "chrome/browser/ui/webui/about_ui.h"
 #include "chrome/browser/ui/webui/bluetooth_internals/bluetooth_internals_ui.h"
 #include "chrome/browser/ui/webui/bookmarks_ui.h"
 #include "chrome/browser/ui/webui/components_ui.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
@@ skipping 492 matching lines @@
   if (url.host_piece() == chrome::kChromeUIPopularSitesInternalsHost)
     return &NewWebUI<PopularSitesInternalsUI>;
   if (url.host_piece() == chrome::kChromeUISnippetsInternalsHost &&
       !profile->IsOffTheRecord())
     return &NewWebUI<SnippetsInternalsUI>;
 #if defined(ENABLE_VR_SHELL) || defined(ENABLE_WEBVR)
   if (url.host_piece() == chrome::kChromeUIVrShellUIHost)
     return &NewWebUI<VrShellUIUI>;
 #endif
 #else
-  if (url.SchemeIs(content::kChromeDevToolsScheme))
+  if (url.SchemeIs(content::kChromeDevToolsScheme)) {
+    if (!DevToolsUIBindings::IsValidFrontendURL(url))
+      return nullptr;
     return &NewWebUI<DevToolsUI>;
-
+  }
   // chrome://inspect isn't supported on Android nor iOS. Page debugging is
   // handled by a remote devtools on the host machine, and other elements, i.e.
   // extensions aren't supported.
   if (url.host_piece() == chrome::kChromeUIInspectHost)
     return &NewWebUI<InspectUI>;
 #endif
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
   if (url.host_piece() == chrome::kChromeUIChromeSigninHost)
     return &NewWebUI<InlineLoginUI>;
   if (url.host_piece() == chrome::kChromeUIMdUserManagerHost)
@@ skipping 280 matching lines @@
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host_piece() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }