Move enable extensions define to a build flag.

chrome/browser/nacl_host/nacl_browser_delegate_impl.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_NACL_HOST_NACL_BROWSER_DELEGATE_IMPL_H_
 #define CHROME_BROWSER_NACL_HOST_NACL_BROWSER_DELEGATE_IMPL_H_
 
 #include <set>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/nacl/browser/nacl_browser_delegate.h"
+#include "extensions/features/features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "base/memory/ref_counted.h"
 #include "extensions/common/url_pattern.h"
 
 namespace extensions {
 class InfoMap;
 }
 #endif
 
 class ProfileManager;
 
@@ skipping 17 matching lines @@
                              const base::FilePath& profile_directory,
                              base::FilePath* file_path) override;
   void SetDebugPatterns(const std::string& debug_patterns) override;
   bool URLMatchesDebugPatterns(const GURL& manifest_url) override;
   content::BrowserPpapiHost::OnKeepaliveCallback GetOnKeepaliveCallback()
       override;
   bool IsNonSfiModeAllowed(const base::FilePath& profile_directory,
                            const GURL& manifest_url) override;
 
  private:
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   scoped_refptr<extensions::InfoMap> GetExtensionInfoMap(
       const base::FilePath& profile_directory);
   std::vector<URLPattern> debug_patterns_;
 #endif
 
   ProfileManager* profile_manager_;
   bool inverse_debug_patterns_;
   std::set<std::string> allowed_nonsfi_origins_;
   DISALLOW_COPY_AND_ASSIGN(NaClBrowserDelegateImpl);
 };
 
 
 #endif  // CHROME_BROWSER_NACL_HOST_NACL_BROWSER_DELEGATE_IMPL_H_