Add launcherPage.hide() API.

chrome/browser/extensions/api/launcher_page/launcher_page_api.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/api/launcher_page/launcher_page_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service.h"
@@ skipping 47 matching lines @@
       chrome::GetHostDesktopTypeForNativeWindow(
           GetAssociatedWebContents()->GetTopLevelNativeWindow());
 
   AppListService::Get(host_desktop)
       ->ShowForCustomLauncherPage(
           Profile::FromBrowserContext(browser_context()));
 
   return RespondNow(NoArguments());
 }
 
+LauncherPageHideFunction::LauncherPageHideFunction() {
+}
+
+ExtensionFunction::ResponseAction LauncherPageHideFunction::Run() {
+  chrome::HostDesktopType host_desktop =
+      chrome::GetHostDesktopTypeForNativeWindow(
+          GetAssociatedWebContents()->GetTopLevelNativeWindow());
+
+  AppListService::Get(host_desktop)->HideCustomLauncherPage();
+
+  return RespondNow(NoArguments());
+}
+
 LauncherPageSetEnabledFunction::LauncherPageSetEnabledFunction() {
 }
 
 ExtensionFunction::ResponseAction LauncherPageSetEnabledFunction::Run() {
   scoped_ptr<api::launcher_page::SetEnabled::Params> params(
       api::launcher_page::SetEnabled::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   app_list::AppListSyncableService* service =
       LauncherPageAPI::GetFactoryInstance()
           ->Get(browser_context())
           ->GetService();
   app_list::AppListModel* model = service->GetModel();
   model->SetCustomLauncherPageEnabled(params->enabled);
 
   return RespondNow(NoArguments());
 }
 
 }  // namespace extensions