Remove WebContents::GetRoutingID().

chrome/browser/ui/webui/print_preview/print_preview_handler.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/ui/webui/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 #include <stddef.h>
 
 #include <map>
@@ skipping 56 matching lines @@
 #include "components/signin/core/browser/gaia_cookie_manager_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 #include "net/base/url_util.h"
 #include "printing/backend/print_backend.h"
 #include "printing/backend/print_backend_consts.h"
 #include "printing/features/features.h"
 #include "printing/print_settings.h"
 #include "printing/printing_context.h"
 #include "printing/units.h"
@@ skipping 827 matching lines @@
 
     // Do this so the initiator can open a new print preview dialog, while the
     // current print preview dialog is still handling its print job.
     WebContents* initiator = GetInitiator();
     if (initiator) {
       // Save initiator IDs. |PrintingMessageFilter::OnUpdatePrintSettings|
       // would be called when initiator info is cleared.
       settings->SetInteger(printing::kPreviewInitiatorHostId,
                            initiator->GetRenderProcessHost()->GetID());
       settings->SetInteger(printing::kPreviewInitiatorRoutingId,
-                           initiator->GetRoutingID());
+                           initiator->GetRenderViewHost()->GetRoutingID());

[Lei Zhang, 2016/11/24 17:18:26]

Uh oh, this is wrong. I have a separate fix:
https://codereview.chromium.org/2527913002/

Hope you don't mind, but I'd like to land that separately and merge to M56.

     }
 
     ClearInitiatorDetails();
 
     // The PDF being printed contains only the pages that the user selected,
     // so ignore the page range and print all pages.
     settings->Remove(printing::kSettingPageRange, NULL);
     // Reset selection only flag for the same reason.
     settings->SetBoolean(printing::kSettingShouldPrintSelectionOnly, false);
 
@@ skipping 762 matching lines @@
 
 void PrintPreviewHandler::UnregisterForGaiaCookieChanges() {
   if (gaia_cookie_manager_service_)
     gaia_cookie_manager_service_->RemoveObserver(this);
 }
 
 void PrintPreviewHandler::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   pdf_file_saved_closure_ = closure;
 }