ExtensionNavigationThrottle: No platform apps in normal tabs.

chrome/browser/ui/browser_navigator.cc

Index: chrome/browser/ui/browser_navigator.cc
diff --git a/chrome/browser/ui/browser_navigator.cc b/chrome/browser/ui/browser_navigator.cc
index e8190f627e85602f6c76f35a3bd53c148b133aae..730b9b16afc5fe90ac7f8e230e00de3074f9a67d 100644
--- a/chrome/browser/ui/browser_navigator.cc
+++ b/chrome/browser/ui/browser_navigator.cc
@@ -50,9 +50,6 @@
 #if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/web_applications/web_app.h"
-#include "extensions/browser/extension_registry.h"
-#include "extensions/common/extension.h"
-#include "extensions/common/extension_set.h"
 #endif
 
 using content::GlobalRequestID;
@@ -421,15 +418,6 @@ void Navigate(NavigateParams* params) {
   if (!AdjustNavigateParamsForURL(params))
     return;
 
-#if BUILDFLAG(ENABLE_EXTENSIONS)
-  const extensions::Extension* extension =
-    extensions::ExtensionRegistry::Get(params->initiating_profile)->
-        enabled_extensions().GetExtensionOrAppByURL(params->url);
-  // Platform apps cannot navigate. Block the request.
-  if (extension && extension->is_platform_app())
-    params->url = GURL(chrome::kExtensionInvalidRequestURL);
-#endif
-
   // The browser window may want to adjust the disposition.
   if (params->disposition == WindowOpenDisposition::NEW_POPUP &&
       source_browser && source_browser->window()) {