Mark printing code as basic printing and/or print preview code.

components/printing/common/print_messages.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 "base/strings/string16.h"
 #include "ui/gfx/geometry/size.h"
 
 #define IPC_MESSAGE_IMPL
 #include "components/printing/common/print_messages.h"
 
@@ skipping 77 matching lines @@
   : pages() {
 }
 
 PrintMsg_PrintPages_Params::~PrintMsg_PrintPages_Params() {}
 
 void PrintMsg_PrintPages_Params::Reset() {
   params.Reset();
   pages = std::vector<int>();
 }
 
+#if defined(ENABLE_PRINT_PREVIEW)
 PrintHostMsg_RequestPrintPreview_Params::
     PrintHostMsg_RequestPrintPreview_Params()
     : is_modifiable(false),
       webnode_only(false),
       has_selection(false),
       selection_only(false) {
 }
 
 PrintHostMsg_RequestPrintPreview_Params::
     ~PrintHostMsg_RequestPrintPreview_Params() {}
 
 PrintHostMsg_SetOptionsFromDocument_Params::
     PrintHostMsg_SetOptionsFromDocument_Params()
     : is_scaling_disabled(false),
       copies(0),
       duplex(printing::UNKNOWN_DUPLEX_MODE) {
 }
 
 PrintHostMsg_SetOptionsFromDocument_Params::
     ~PrintHostMsg_SetOptionsFromDocument_Params() {
 }
+#endif  // defined(ENABLE_PRINT_PREVIEW)