Cleanup: Remove most enable_extensions logic in chrome/ extensions code.

chrome/browser/ui/webui/extensions/extension_settings_handler.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/ui/webui/extensions/extension_settings_handler.h"
 
 #include "apps/app_load_service.h"
 #include "apps/saved_files_service.h"
 #include "base/auto_reset.h"
 #include "base/base64.h"
@@ skipping 1465 matching lines @@
         ExtensionPage(web_contents->GetURL(),
                       process->GetID(),
                       host->GetRoutingID(),
                       process->GetBrowserContext()->IsOffTheRecord(),
                       is_background_page && has_generated_background_page));
   }
 }
 
 ExtensionUninstallDialog*
 ExtensionSettingsHandler::GetExtensionUninstallDialog() {
-#if !defined(OS_ANDROID)
   if (!extension_uninstall_dialog_.get()) {
     Browser* browser = chrome::FindBrowserWithWebContents(
         web_ui()->GetWebContents());
     extension_uninstall_dialog_.reset(
         ExtensionUninstallDialog::Create(extension_service_->profile(),
                                          browser->window()->GetNativeWindow(),
                                          this));
   }
   return extension_uninstall_dialog_.get();
-#else
-  return NULL;
-#endif  // !defined(OS_ANDROID)
 }
 
 void ExtensionSettingsHandler::OnReinstallComplete(
     bool success,
     const std::string& error,
     webstore_install::Result result) {
   MaybeUpdateAfterNotification();
 }
 
 void ExtensionSettingsHandler::OnRequirementsChecked(
     std::string extension_id,
     std::vector<std::string> requirement_errors) {
   if (requirement_errors.empty()) {
     extension_service_->EnableExtension(extension_id);
   } else {
     ExtensionErrorReporter::GetInstance()->ReportError(
         base::UTF8ToUTF16(JoinString(requirement_errors, ' ')),
         true);  // Be noisy.
   }
   requirements_checker_.reset();
 }
 
 }  // namespace extensions