Only build extensions code in chrome/browser/ui when extensions are enabled.

chrome/browser/extensions/extension_system_impl.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/extensions/extension_system_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 12 matching lines @@
 #include "chrome/browser/extensions/extension_warning_badge_service.h"
 #include "chrome/browser/extensions/extension_warning_set.h"
 #include "chrome/browser/extensions/install_verifier.h"
 #include "chrome/browser/extensions/navigation_observer.h"
 #include "chrome/browser/extensions/shared_module_service.h"
 #include "chrome/browser/extensions/standard_management_policy_provider.h"
 #include "chrome/browser/extensions/updater/manifest_fetch_data.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
-#include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/features/feature_channel.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/url_data_source.h"
 #include "extensions/browser/content_verifier.h"
 #include "extensions/browser/content_verifier_delegate.h"
@@ skipping 10 matching lines @@
 #include "extensions/browser/quota_service.h"
 #include "extensions/browser/runtime_data.h"
 #include "extensions/browser/state_store.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest.h"
 #include "net/base/escape.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/unpacked_installer.h"
+#include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #endif
 
 #if defined(ENABLE_NOTIFICATIONS)
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "ui/message_center/notifier_settings.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/app_mode/app_mode_utils.h"
@@ skipping 283 matching lines @@
       // Load the component extension manifest synchronously.
       // Blocking the UI thread is acceptable here since
       // this flag designated for developers.
       base::ThreadRestrictions::ScopedAllowIO allow_io;
       extension_service_->component_loader()->AddOrReplace(
           base::FilePath(t.token()));
     }
   }
   extension_service_->Init();
 
+#if defined(ENABLE_EXTENSIONS)
   // Make the chrome://extension-icon/ resource available.
   content::URLDataSource::Add(profile_, new ExtensionIconSource(profile_));
+#endif
 
   extension_warning_service_.reset(new ExtensionWarningService(profile_));
   extension_warning_badge_service_.reset(
       new ExtensionWarningBadgeService(profile_));
   extension_warning_service_->AddObserver(
       extension_warning_badge_service_.get());
   error_console_.reset(new ErrorConsole(profile_));
   quota_service_.reset(new QuotaService);
 
 // TODO(thestig): Remove this once ExtensionSystemImpl is no longer built on
@@ skipping 231 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
 }  // namespace extensions