Move enable extensions define to a build flag.

chrome/browser/printing/print_view_manager_common.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/printing/print_view_manager_common.h"
 
+#include "extensions/features/features.h"
 #include "printing/features/features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "components/guest_view/browser/guest_view_manager.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 #include "chrome/browser/printing/print_view_manager.h"
 #else
 #include "chrome/browser/printing/print_view_manager_basic.h"
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 namespace printing {
 namespace {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 // Stores |guest_contents| in |result| and returns true if |guest_contents| is a
 // full page MimeHandlerViewGuest plugin. Otherwise, returns false.
 bool StoreFullPagePlugin(content::WebContents** result,
                          content::WebContents* guest_contents) {
   auto* guest_view =
       extensions::MimeHandlerViewGuest::FromWebContents(guest_contents);
   if (guest_view && guest_view->is_full_page_plugin()) {
     *result = guest_contents;
     return true;
   }
   return false;
 }
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 
 // If we have a single full-page embedded mime handler view guest, print the
 // guest's WebContents instead.
 content::WebContents* GetWebContentsToUse(content::WebContents* contents) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   guest_view::GuestViewManager* guest_view_manager =
       guest_view::GuestViewManager::FromBrowserContext(
           contents->GetBrowserContext());
   if (guest_view_manager) {
     guest_view_manager->ForEachGuest(
         contents,
         base::Bind(&StoreFullPagePlugin, &contents));
   }
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
   return contents;
 }
 
 }  // namespace
 
 void StartPrint(content::WebContents* contents,
                 bool print_preview_disabled,
                 bool selection_only) {
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   using PrintViewManagerImpl = PrintViewManager;
@@ skipping 23 matching lines @@
   PrintViewManager* print_view_manager =
       PrintViewManager::FromWebContents(GetWebContentsToUse(contents));
   if (!print_view_manager)
     return;
   print_view_manager->BasicPrint();
 #endif  // ENABLE_PRINT_PREVIEW
 }
 #endif  // ENABLE_BASIC_PRINTING
 
 }  // namespace printing