Surface button for loading stale cache copy on net error page.

chrome/browser/ui/browser_commands.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/ui/browser_commands.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chrome_page_zoom.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/api/commands/command_service.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/net/net_error_tab_helper.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/rlz/rlz.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
 #include "chrome/browser/sessions/tab_restore_service_delegate.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
@@ skipping 196 matching lines @@
                     WindowOpenDisposition disposition,
                     bool ignore_cache) {
   // As this is caused by a user action, give the focus to the page.
   //
   // Also notify RenderViewHostDelegate of the user gesture; this is
   // normally done in Browser::Navigate, but a reload bypasses Navigate.
   WebContents* new_tab = GetTabAndRevertIfNecessary(browser, disposition);
   new_tab->UserGestureDone();
   if (!new_tab->FocusLocationBarByDefault())
     new_tab->GetView()->Focus();
+
+  // Notify error system for statistics.
+  chrome_browser_net::NetErrorTabHelper* net_error_tab_helper =
+      chrome_browser_net::NetErrorTabHelper::FromWebContents(new_tab);
+  if (net_error_tab_helper)
+    net_error_tab_helper->NotifyBrowserReloading();

[mmenke, 2014/04/09 15:59:26]

We can't deduce this from the information passed to
WebContentsObserver::DidStartNavigationToPendingEntry?

[Randy Smith (Not in Mondays), 2014/04/10 21:51:01]

So I stopped here going down the stack because this was the last place where I
could be sure that we really were coming from the browser reload button. 
Codesearch says that NavigationController::Reload* is called all over the place.
 So I didn't think I could with certainty tell that the browser reload button
was being hit if I went below this point in the stack.

+
   if (ignore_cache)
     new_tab->GetController().ReloadIgnoringCache(true);
   else
     new_tab->GetController().Reload(true);
 }
 
 bool IsShowingWebContentsModalDialog(const Browser* browser) {
   WebContents* web_contents =
       browser->tab_strip_model()->GetActiveWebContents();
   if (!web_contents)
@@ skipping 1010 matching lines @@
           Browser::TYPE_POPUP, app_name, gfx::Rect(), browser->profile(),
           browser->host_desktop_type()));
   app_browser->tab_strip_model()->AppendWebContents(contents, true);
 
   contents->GetMutableRendererPrefs()->can_accept_load_drops = false;
   contents->GetRenderViewHost()->SyncRendererPrefs();
   app_browser->window()->Show();
 }
 
 }  // namespace chrome