Use webview in web activity

athena/content/content_activity_factory.cc

Index: athena/content/content_activity_factory.cc
diff --git a/athena/content/content_activity_factory.cc b/athena/content/content_activity_factory.cc
index ab6ecf712b5142faeeccaa2248dfa8181284bdfa..9486d1fef32bdc501cb5b84a344d78c081f188cb 100644
--- a/athena/content/content_activity_factory.cc
+++ b/athena/content/content_activity_factory.cc
@@ -5,8 +5,6 @@
 #include "athena/content/public/content_activity_factory.h"
 
 #include "athena/content/web_activity.h"
-#include "content/public/browser/web_contents.h"
-#include "url/gurl.h"
 
 namespace athena {
 
@@ -18,16 +16,7 @@ ContentActivityFactory::~ContentActivityFactory() {}
 Activity* ContentActivityFactory::CreateWebActivity(
     content::BrowserContext* browser_context,
     const GURL& url) {
-  content::WebContents::CreateParams params(browser_context);
-  content::WebContents* contents = content::WebContents::Create(params);
-  contents->GetController().LoadURL(url,
-                                    content::Referrer(),
-                                    content::PAGE_TRANSITION_TYPED,
-                                    std::string());
-  WebActivity* activity = new WebActivity(contents);
-  // TODO(mukai): it might be better to move Focus to another place.
-  contents->Focus();
-  return activity;
+  return new WebActivity(browser_context, url);
 }
 
 }  // namespace athena