Revert of Block top-level navigations to nested URLs with extension origins from non-extension procs

chrome/browser/net/chrome_extensions_network_delegate.cc

Index: chrome/browser/net/chrome_extensions_network_delegate.cc
diff --git a/chrome/browser/net/chrome_extensions_network_delegate.cc b/chrome/browser/net/chrome_extensions_network_delegate.cc
index 502585cf85702d08e4beb93c5eae6995d59d80d6..0f2f38bc43d83e528e3aa7e19dd57e87c6aef00d 100644
--- a/chrome/browser/net/chrome_extensions_network_delegate.cc
+++ b/chrome/browser/net/chrome_extensions_network_delegate.cc
@@ -20,7 +20,6 @@
 #include "extensions/browser/api/web_request/web_request_api.h"
 #include "extensions/browser/info_map.h"
 #include "extensions/browser/process_manager.h"
-#include "extensions/common/constants.h"
 #include "net/url_request/url_request.h"
 
 using content::BrowserThread;
@@ -160,21 +159,6 @@
     net::URLRequest* request,
     const net::CompletionCallback& callback,
     GURL* new_url) {
-  const content::ResourceRequestInfo* info =
-      content::ResourceRequestInfo::ForRequest(request);
-  GURL url(request->url());
-
-  // Block top-level navigations to blob: or filesystem: URLs with extension
-  // origin from non-extension processes.  See https://crbug.com/645028.
-  bool is_nested_url = url.SchemeIsFileSystem() || url.SchemeIsBlob();
-  bool is_navigation =
-      info && content::IsResourceTypeFrame(info->GetResourceType());
-  if (is_nested_url && is_navigation && info->IsMainFrame() &&
-      url::Origin(url).scheme() == extensions::kExtensionScheme &&
-      !extension_info_map_->process_map().Contains(info->GetChildID())) {
-    return net::ERR_ABORTED;
-  }
-
   return ExtensionWebRequestEventRouter::GetInstance()->OnBeforeRequest(
       profile_, extension_info_map_.get(), request, callback, new_url);
 }