Track where WebContents are created in order to better understand issue.

chrome/browser/sessions/session_restore_android.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 "chrome/browser/sessions/session_restore.h"
 
 #include <vector>
 
 #include "base/memory/scoped_vector.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/android/tab_model/tab_model.h"
 #include "chrome/browser/ui/android/tab_model/tab_model_list.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "components/sessions/content/content_serialized_navigation_builder.h"
 #include "components/sessions/core/session_types.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_source.h"
 
 // The android implementation does not do anything "foreign session" specific.
 // We use it to restore tabs from "recently closed" too.
 // static
 content::WebContents* SessionRestore::RestoreForeignSessionTab(
     content::WebContents* web_contents,
     const sessions::SessionTab& session_tab,
     WindowOpenDisposition disposition) {
   DCHECK(session_tab.navigations.size() > 0);
   content::BrowserContext* context = web_contents->GetBrowserContext();
   Profile* profile = Profile::FromBrowserContext(context);
   TabModel* tab_model = TabModelList::GetTabModelForWebContents(web_contents);
   DCHECK(tab_model);
   ScopedVector<content::NavigationEntry> scoped_entries =
       sessions::ContentSerializedNavigationBuilder::ToNavigationEntries(
           session_tab.navigations, profile);
   content::WebContents* new_web_contents = content::WebContents::Create(
       content::WebContents::CreateParams(context));
+  WebContentsSource::CreateForWebContentsAndLocation(new_web_contents,
+                                                     FROM_HERE);
   int selected_index = session_tab.normalized_navigation_index();
   new_web_contents->GetController().Restore(
       selected_index,
       content::NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY,
       &scoped_entries);
 
   TabAndroid* current_tab = TabAndroid::FromWebContents(web_contents);
   DCHECK(current_tab);
   if (disposition == CURRENT_TAB) {
     current_tab->SwapTabContents(web_contents, new_web_contents, false, false);
     delete web_contents;
   } else {
     DCHECK(disposition == NEW_FOREGROUND_TAB ||
         disposition == NEW_BACKGROUND_TAB);
     tab_model->CreateTab(new_web_contents, current_tab->GetAndroidId());
   }
   return new_web_contents;
 }
 
 // static
 std::vector<Browser*> SessionRestore::RestoreForeignSessionWindows(
     Profile* profile,
     chrome::HostDesktopType host_desktop_type,
     std::vector<const sessions::SessionWindow*>::const_iterator begin,
     std::vector<const sessions::SessionWindow*>::const_iterator end) {
   NOTREACHED();
   return std::vector<Browser*>();
 }