Delete IDC_CONTENT_CONTEXT_VIEWPAGEINFO and unused strings

chrome/browser/printing/print_preview_context_menu_observer.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/printing/print_preview_context_menu_observer.h"
 
 #include "base/logging.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 
@@ skipping 10 matching lines @@
   if (!controller)
     return false;
   return (controller->GetPrintPreviewForContents(contents_) != nullptr);
 }
 
 bool PrintPreviewContextMenuObserver::IsCommandIdSupported(int command_id) {
   switch (command_id) {
     case IDC_PRINT:
     case IDC_VIEW_SOURCE:
     case IDC_CONTENT_CONTEXT_VIEWFRAMESOURCE:
-    case IDC_CONTENT_CONTEXT_VIEWPAGEINFO:
     case IDC_CONTENT_CONTEXT_SEARCHWEBFOR:
       return IsPrintPreviewDialog();
 
     default:
       return false;
   }
 }
 
 bool PrintPreviewContextMenuObserver::IsCommandIdEnabled(int command_id) {
   switch (command_id) {
     case IDC_PRINT:
     case IDC_VIEW_SOURCE:
     case IDC_CONTENT_CONTEXT_VIEWFRAMESOURCE:
-    case IDC_CONTENT_CONTEXT_VIEWPAGEINFO:
     case IDC_CONTENT_CONTEXT_SEARCHWEBFOR:
       return false;
 
     default:
       NOTREACHED();
       return true;
   }
 }