Remove list of observers from background loader and associated methods. Also small compile-friendl…

components/offline_pages/content/background_loader/background_loader_contents.h

 // 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.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_CONTENT_BACKGROUND_LOADER_BACKGROUND_LOADER_CONTENTS_H_
 #define COMPONENTS_OFFLINE_PAGES_CONTENT_BACKGROUND_LOADER_BACKGROUND_LOADER_CONTENTS_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "url/gurl.h"
 
 namespace content {
-class WebContentsObserver;
 class WebContents;
 }
 
 namespace background_loader {
 
 // This class maintains a WebContents used in the background. It can host
 // a renderer but does not have any visible display.
 class BackgroundLoaderContents : public content::WebContentsDelegate {
  public:
-  // Creates BackgroundLoaderContents with specified |browser_context| and
-  // |session_storage_namespace|.  This ctor should only be used if a different
-  // session storage (e.g. non-persistent/incognito) should be used.
-  // |session_storage_namespace| should not be null.
-  BackgroundLoaderContents(
-      content::BrowserContext* browser_context,
-      content::SessionStorageNamespace* session_storage_namespace);
-
   // Creates BackgroundLoaderContents with specified |browser_context|. Uses
   // default session storage space.
   explicit BackgroundLoaderContents(content::BrowserContext* browser_context);
   ~BackgroundLoaderContents() override;
 
   // Loads the URL in a WebContents. Will call observe on all current observers
   // with the created WebContents.
   void LoadPage(const GURL& url);
   // Cancels loading of the current page. Calls Close() on internal WebContents.
   void Cancel();
-
-  void AddObserver(content::WebContentsObserver* observer);
-  void RemoveObserver(content::WebContentsObserver* observer);
+  // Returns the inner web contents.
+  content::WebContents* web_contents() { return web_contents_.get(); }
 
   // content::WebContentsDelegate implementation:
   bool IsNeverVisible(content::WebContents* web_contents) override;
   void CloseContents(content::WebContents* source) override;
   bool ShouldSuppressDialogs(content::WebContents* source) override;
   bool ShouldFocusPageAfterCrash() override;
   void CanDownload(const GURL& url,
                    const std::string& request_method,
                    const base::Callback<void(bool)>& callback) override;
 
   bool ShouldCreateWebContents(
       content::WebContents* contents,
       int32_t route_id,
       int32_t main_frame_route_id,
       int32_t main_frame_widget_route_id,
       WindowContainerType window_container_type,
       const std::string& frame_name,
       const GURL& target_url,
       const std::string& partition_id,
       content::SessionStorageNamespace* session_storage_namespace) override;
 
-  void AddNewContents(WebContents* source,
-                      WebContents* new_contents,
+  void AddNewContents(content::WebContents* source,
+                      content::WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
 
 #if defined(OS_ANDROID)
   bool ShouldBlockMediaRequest(const GURL& url) override;
 #endif
 
   void RequestMediaAccessPermission(
       content::WebContents* contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) override;
   bool CheckMediaAccessPermission(content::WebContents* contents,
                                   const GURL& security_origin,
                                   content::MediaStreamType type) override;
 
  private:
   std::unique_ptr<content::WebContents> web_contents_;
-  content::SessionStorageNamespaceMap session_storage_namespace_map_;
   content::BrowserContext* browser_context_;
-  base::ObserverList<WebContentsObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundLoaderContents);
 };
 
 }  // namespace background_loader
 #endif  // COMPONENTS_OFFLINE_PAGES_CONTENT_BACKGROUND_LOADER_BACKGROUND_LOADER_CONTENTS_H_