Revert of Aura Android: ShowBrowserSignin is not defined for Android, use NOTIMPLEMENTED for now

chrome/browser/ui/views/extensions/extension_installed_bubble_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/extensions/extension_installed_bubble_view.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/i18n/rtl.h"
@@ skipping 268 matching lines @@
 void InstalledBubbleContent::ButtonPressed(views::Button* sender,
                                            const ui::Event& event) {
   DCHECK_EQ(sender, close_button_);
   GetWidget()->Close();
 }
 
 void InstalledBubbleContent::LinkClicked(views::Link* source, int event_flags) {
   GetWidget()->Close();
 
   if (source == sign_in_link_) {
-#if defined(OS_ANDROID)
-    // TODO(bshe): Figure out what to do on Android platform. See
-    // crbug.com/559340.
-    NOTIMPLEMENTED();
-#else
     chrome::ShowBrowserSignin(
         browser_, signin_metrics::SOURCE_EXTENSION_INSTALL_BUBBLE);
-#endif
     return;
   }
 
   DCHECK_EQ(manage_shortcut_, source);
 
   std::string configure_url = chrome::kChromeUIExtensionsURL;
   configure_url += chrome::kExtensionConfigureCommandsSubPage;
   chrome::NavigateParams params(chrome::GetSingletonTabNavigateParams(
       browser_, GURL(configure_url)));
   chrome::Navigate(&params);
@@ skipping 254 matching lines @@
   if (bubble_->extension() && bubble_->type() == bubble_->PAGE_ACTION &&
       !extensions::FeatureSwitch::extension_action_redesign()->IsEnabled()) {
     BrowserView* browser_view =
         BrowserView::GetBrowserViewForBrowser(bubble_->browser());
     browser_view->GetLocationBarView()->SetPreviewEnabledPageAction(
         extensions::ExtensionActionManager::Get(bubble_->browser()->profile())
             ->GetPageAction(*bubble_->extension()),
         false);  // preview_enabled
   }
 }