Fix the remaining cases of classes implementing non-existent TabContentsDelegate::IsPopup().

chrome/browser/sidebar/sidebar_container.cc

 // Copyright (c) 2011 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/sidebar/sidebar_container.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_modal_dialogs/message_box_handler.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 88 matching lines @@
 
 void SidebarContainer::SetIcon(const SkBitmap& bitmap) {
   use_default_icon_ = false;
   *icon_ = bitmap;
 }
 
 void SidebarContainer::SetTitle(const string16& title) {
   title_ = title;
 }
 
-bool SidebarContainer::IsPopup(const TabContents* source) const {
-  return false;
-}
-
 content::JavaScriptDialogCreator*
 SidebarContainer::GetJavaScriptDialogCreator() {
   return GetJavaScriptDialogCreatorInstance();
 }
 
 void SidebarContainer::OnImageLoaded(SkBitmap* image,
                                      const ExtensionResource& resource,
                                      int index) {
   if (image && use_default_icon_) {
     *icon_ = *image;
      delegate_->UpdateSidebar(this);
   }
 }
 
 const Extension* SidebarContainer::GetExtension() const {
   Profile* profile =
       Profile::FromBrowserContext(sidebar_contents_->browser_context());
   ExtensionService* service = profile->GetExtensionService();
   if (!service)
     return NULL;
   return service->GetExtensionById(
       extension_sidebar_utils::GetExtensionIdByContentId(content_id_), false);
 }