Don't split off NTP subframes with TDI.

content/public/browser/content_browser_client.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/public/browser/content_browser_client.h"
 
 #include "base/files/file_path.h"
 #include "base/guid.h"
 #include "build/build_config.h"
 #include "content/public/browser/client_certificate_delegate.h"
@@ skipping 61 matching lines @@
 bool ContentBrowserClient::CanCommitURL(RenderProcessHost* process_host,
                                         const GURL& site_url) {
   return true;
 }
 
 bool ContentBrowserClient::ShouldAllowOpenURL(SiteInstance* site_instance,
                                               const GURL& url) {
   return true;
 }
 
+bool ContentBrowserClient::
+    ShouldFrameShareParentSiteInstanceDespiteTopDocumentIsolation(
+        const GURL& url,
+        SiteInstance* parent_site_instance) {
+  return false;
+}
+
 bool ContentBrowserClient::IsSuitableHost(RenderProcessHost* process_host,
                                           const GURL& site_url) {
   return true;
 }
 
 bool ContentBrowserClient::MayReuseHost(RenderProcessHost* process_host) {
   return true;
 }
 
 bool ContentBrowserClient::ShouldTryToUseExistingProcessHost(
@@ skipping 328 matching lines @@
     const std::string& name) {
   return nullptr;
 }
 
 std::unique_ptr<MemoryCoordinatorDelegate>
 ContentBrowserClient::GetMemoryCoordinatorDelegate() {
   return std::unique_ptr<MemoryCoordinatorDelegate>();
 }
 
 }  // namespace content