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

chrome/browser/extensions/chrome_content_browser_client_extensions_part.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_CHROME_CONTENT_BROWSER_CLIENT_EXTENSIONS_PART_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_CONTENT_BROWSER_CLIENT_EXTENSIONS_PART_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/chrome_content_browser_client_parts.h"
@@ skipping 53 matching lines @@
                                  bool* result);
 
   // Helper function to call InfoMap::SetSigninProcess().
   static void SetSigninProcess(content::SiteInstance* site_instance);
 
   // Creates a new VpnServiceProxy. The caller owns the returned value. It's
   // valid to return nullptr.
   static std::unique_ptr<content::VpnServiceProxy> GetVpnServiceProxy(
       content::BrowserContext* browser_context);
 
+  static bool ShouldFrameShareParentSiteInstanceDespiteTopDocumentIsolation(
+      const GURL& url,
+      content::SiteInstance* parent_site_instance);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(ChromeContentBrowserClientExtensionsPartTest,
                            ShouldAllowOpenURLMetricsForEmptySiteURL);
   FRIEND_TEST_ALL_PREFIXES(ChromeContentBrowserClientExtensionsPartTest,
                            ShouldAllowOpenURLMetricsForKnownSchemes);
 
   // Specifies reasons why web-accessible resource checks in ShouldAllowOpenURL
   // might fail.
   //
   // This enum backs an UMA histogram.  The order of existing values
@@ skipping 35 matching lines @@
       Profile* profile) override;
   void ResourceDispatcherHostCreated() override;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClientExtensionsPart);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_CONTENT_BROWSER_CLIENT_EXTENSIONS_PART_H_