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

chrome/browser/dom_distiller/tab_utils.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/dom_distiller/tab_utils.h"
 
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "components/dom_distiller/content/browser/distiller_page_web_contents.h"
 #include "components/dom_distiller/core/distiller_page.h"
 #include "components/dom_distiller/core/dom_distiller_service.h"
 #include "components/dom_distiller/core/task_tracker.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/dom_distiller/core/url_utils.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_source.h"
 
 namespace {
 
 using dom_distiller::ViewRequestDelegate;
 using dom_distiller::DistilledArticleProto;
 using dom_distiller::ArticleDistillationUpdate;
 using dom_distiller::ViewerHandle;
 using dom_distiller::SourcePageHandleWebContents;
 using dom_distiller::DomDistillerService;
 using dom_distiller::DomDistillerServiceFactory;
@@ skipping 105 matching lines @@
 }  // namespace
 
 void DistillCurrentPageAndView(content::WebContents* old_web_contents) {
   DCHECK(old_web_contents);
   // Create new WebContents.
   content::WebContents::CreateParams create_params(
       old_web_contents->GetBrowserContext());
   content::WebContents* new_web_contents =
       content::WebContents::Create(create_params);
   DCHECK(new_web_contents);
+  WebContentsSource::CreateForWebContentsAndLocation(new_web_contents,
+                                                     FROM_HERE);
 
   // Copy all navigation state from the old WebContents to the new one.
   new_web_contents->GetController().CopyStateFrom(
       old_web_contents->GetController());
 
   // StartNavigationToDistillerViewer must come before swapping the tab contents
   // to avoid triggering a reload of the page.  This reloadmakes it very
   // difficult to distinguish between the intermediate reload and a user hitting
   // the back button.
   StartNavigationToDistillerViewer(new_web_contents,
@@ skipping 13 matching lines @@
   DCHECK(source_web_contents);
   DCHECK(destination_web_contents);
 
   scoped_ptr<SourcePageHandleWebContents> source_page_handle(
       new SourcePageHandleWebContents(source_web_contents, false));
 
   MaybeStartDistillation(source_page_handle.Pass());
   StartNavigationToDistillerViewer(destination_web_contents,
                                    source_web_contents->GetLastCommittedURL());
 }