Grant access to files in PageState, which have already been validated.

chrome/browser/sessions/session_restore.cc

 // Copyright 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 "chrome/browser/sessions/session_restore.h"
 
 #include <algorithm>
 #include <list>
 #include <set>
 #include <string>
@@ skipping 1064 matching lines @@
                                tab.extension_app_id,
                                false,  // select
                                tab.pinned,
                                true,
                                session_storage_namespace.get(),
                                tab.user_agent_override);
     // Regression check: check that the tab didn't start loading right away. The
     // focused tab will be loaded by Browser, and TabLoader will load the rest.
     DCHECK(web_contents->GetController().NeedsReload());
 
-    // Set up the file access rights for the selected navigation entry.

[Charlie Reis, 2014/11/25 21:00:55]

This is now redundant with RenderFrameHostImpl::OnNavigate.

-    const int id = web_contents->GetRenderProcessHost()->GetID();
-    const content::PageState& page_state =
-        content::PageState::CreateFromEncodedData(
-            tab.navigations.at(selected_index).encoded_page_state());
-    const std::vector<base::FilePath>& file_paths =
-        page_state.GetReferencedFiles();
-    for (std::vector<base::FilePath>::const_iterator file = file_paths.begin();
-         file != file_paths.end(); ++file) {
-      content::ChildProcessSecurityPolicy::GetInstance()->GrantReadFile(id,
-                                                                        *file);
-    }
-
     if (!is_selected_tab)
       tab_loader_->ScheduleLoad(&web_contents->GetController());
     return web_contents;
   }
 
   Browser* CreateRestoredBrowser(Browser::Type type,
                                  gfx::Rect bounds,
                                  ui::WindowShowState show_state,
                                  const std::string& app_name) {
     Browser::CreateParams params(type, profile_, host_desktop_type_);
@@ skipping 214 matching lines @@
   if (!active_session_restorers)
     return false;
   for (std::set<SessionRestoreImpl*>::const_iterator it =
            active_session_restorers->begin();
        it != active_session_restorers->end(); ++it) {
     if ((*it)->synchronous())
       return true;
   }
   return false;
 }