Remove RenderFrameHost pointer from ChooserController.

chrome/browser/chooser_controller/chooser_controller.cc

 // Copyright 2016 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/chooser_controller/chooser_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/url_formatter/elide_url.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/origin.h"
 
-ChooserController::ChooserController(content::RenderFrameHost* owner,
-                                     int title_string_id_origin,
-                                     int title_string_id_extension)
-    : owning_frame_(owner),
-      title_string_id_origin_(title_string_id_origin),
-      title_string_id_extension_(title_string_id_extension) {}
+namespace {
 
-ChooserController::~ChooserController() {}
-
-base::string16 ChooserController::GetTitle() const {
-  if (!owning_frame_)
-    return base::string16();
-
-  url::Origin origin = owning_frame_->GetLastCommittedOrigin();
+base::string16 CreateTitle(content::RenderFrameHost* render_frame_host,
+                           int title_string_id_origin,
+                           int title_string_id_extension) {
+  url::Origin origin = render_frame_host->GetLastCommittedOrigin();
 
   if (origin.scheme() == extensions::kExtensionScheme) {
     content::WebContents* web_contents =
-        content::WebContents::FromRenderFrameHost(owning_frame_);
+        content::WebContents::FromRenderFrameHost(render_frame_host);
     content::BrowserContext* browser_context =
         web_contents->GetBrowserContext();
     extensions::ExtensionRegistry* extension_registry =
         extensions::ExtensionRegistry::Get(browser_context);
     if (extension_registry) {
       const extensions::Extension* extension =
           extension_registry->enabled_extensions().GetByID(origin.host());
       if (extension) {
-        return l10n_util::GetStringFUTF16(title_string_id_extension_,
+        return l10n_util::GetStringFUTF16(title_string_id_extension,
                                           base::UTF8ToUTF16(extension->name()));
       }
     }
   }
 
   return l10n_util::GetStringFUTF16(
-      title_string_id_origin_,
+      title_string_id_origin,
       url_formatter::FormatOriginForSecurityDisplay(
           origin, url_formatter::SchemeDisplay::OMIT_CRYPTOGRAPHIC));
 }
 
+}  // namespace
+
+ChooserController::ChooserController(content::RenderFrameHost* owner,
+                                     int title_string_id_origin,
+                                     int title_string_id_extension) {
+  if (owner) {
+    title_ =
+        CreateTitle(owner, title_string_id_origin, title_string_id_extension);
+  }
+}
+
+ChooserController::~ChooserController() {}
+
+base::string16 ChooserController::GetTitle() const {
+  return title_;
+}
+
 bool ChooserController::ShouldShowIconBeforeText() const {
   return false;
 }
 
 bool ChooserController::ShouldShowFootnoteView() const {
   return true;
 }
 
 bool ChooserController::AllowMultipleSelection() const {
   return false;
 }
 
 int ChooserController::GetSignalStrengthLevel(size_t index) const {
   return -1;
 }
 
 bool ChooserController::IsConnected(size_t index) const {
   return false;
 }
 
 bool ChooserController::IsPaired(size_t index) const {
   return false;
 }
 
 void ChooserController::OpenAdapterOffHelpUrl() const {
   NOTREACHED();
 }