Experimental app list: Custom launcher pages have app APIs and style.

chrome/browser/ui/app_list/app_list_view_delegate.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/app_list/app_list_view_delegate.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/metrics/user_metrics.h"
 #include "base/stl_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service_factory.h"
 #include "chrome/browser/ui/app_list/search/search_controller.h"
 #include "chrome/browser/ui/app_list/start_page_service.h"
@@ skipping 131 matching lines @@
   if (app_list::switches::IsExperimentalAppListEnabled() &&
       command_line->HasSwitch(switches::kCustomLauncherPage)) {
     GURL custom_launcher_page_url(
         command_line->GetSwitchValueASCII(switches::kCustomLauncherPage));
     if (!custom_launcher_page_url.SchemeIs(extensions::kExtensionScheme)) {
       LOG(ERROR) << "Invalid custom launcher page URL: "
                  << custom_launcher_page_url.possibly_invalid_spec();
     } else {
       content::WebContents::CreateParams params(profile_);
       custom_page_web_contents_.reset(content::WebContents::Create(params));
+      // This observer will activate the extension when it is navigated to,
+      // which allows Dispatcher to give it the proper context.

[not at google - send to devlin, 2014/07/07 14:50:10]

creating a [Chrome]ExtensionWebContentsObserver does more than just set up the
context, it makes the entire extension infrastructure work.

[Matt Giuca, 2014/07/09 15:05:30]

Done.

+      extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
+          custom_page_web_contents_.get());
       custom_page_web_contents_->GetController().LoadURL(
           custom_launcher_page_url,
           content::Referrer(),
           content::PAGE_TRANSITION_AUTO_TOPLEVEL,
           std::string());
     }
   }
 }
 
 AppListViewDelegate::~AppListViewDelegate() {
@@ skipping 356 matching lines @@
 
 void AppListViewDelegate::AddObserver(
     app_list::AppListViewDelegateObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void AppListViewDelegate::RemoveObserver(
     app_list::AppListViewDelegateObserver* observer) {
   observers_.RemoveObserver(observer);
 }