Disable top-document-isolation if the parent SiteInstance is a hosted app.

chrome/browser/extensions/chrome_content_browser_client_extensions_part.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/extensions/chrome_content_browser_client_extensions_part.h"
 
 #include <stddef.h>
 
 #include <set>
 
@@ skipping 667 matching lines @@
       chromeos::VpnServiceFactory::GetForBrowserContext(browser_context);
   if (!vpn_service)
     return nullptr;
   return vpn_service->GetVpnServiceProxy();
 #else
   return nullptr;
 #endif
 }
 
 // static
+bool ChromeContentBrowserClientExtensionsPart::
+    ShouldFrameShareParentSiteInstanceDespiteTopDocumentIsolation(
+        const GURL& subframe_url,
+        content::SiteInstance* parent_site_instance) {
+  const Extension* extension =
+      ExtensionRegistry::Get(parent_site_instance->GetBrowserContext())
+          ->enabled_extensions()
+          .GetExtensionOrAppByURL(parent_site_instance->GetSiteURL());
+
+  return extension && extension->is_hosted_app();
+}
+
+// static
 void ChromeContentBrowserClientExtensionsPart::RecordShouldAllowOpenURLFailure(
     ShouldAllowOpenURLFailureReason reason,
     const GURL& site_url) {
   UMA_HISTOGRAM_ENUMERATION("Extensions.ShouldAllowOpenURL.Failure", reason,
                             FAILURE_LAST);
 
   // Must be kept in sync with the ShouldAllowOpenURLFailureScheme enum.
   static const char* const kSchemeNames[] = {
       "unknown",
       "",
@@ skipping 173 matching lines @@
     command_line->AppendSwitch(switches::kExtensionProcess);
   }
 }
 
 void ChromeContentBrowserClientExtensionsPart::ResourceDispatcherHostCreated() {
   content::ResourceDispatcherHost::Get()->RegisterInterceptor(
       "Origin", kExtensionScheme, base::Bind(&OnHttpHeaderReceived));
 }
 
 }  // namespace extensions