Updates to PrerenderingOffliner and PrerenderingLoader interfaces to push PrerenderManager knowledge

chrome/browser/android/offline_pages/prerendering_loader.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_
 
 #include "base/callback.h"
 #include "components/offline_pages/background/offliner.h"
 
 class GURL;
-class PrerenderManager;
 
 namespace content {
+class BrowserContext;
 class WebContents;
 class SessionStorageNamespace;
 }  // namespace content
 
 namespace gfx {
 class Size;
 }  // namespace gfx
 
 namespace offline_pages {
 
 // A client-side page loader that integrates with the PrerenderManager to do
 // the page loading in the background.
 class PrerenderingLoader {
  public:
   // Reports status of a load page request with loaded contents if available.
   typedef base::Callback<void(Offliner::CompletionStatus,
                               content::WebContents*)>
       LoadPageCallback;
 
-  explicit PrerenderingLoader(PrerenderManager* prerender_manager);
-  ~PrerenderingLoader();
+  explicit PrerenderingLoader(content::BrowserContext* browser_context);
+  virtual ~PrerenderingLoader();
 
   // Loads a page in the background if possible and returns whether the
   // request was accepted. If so, the LoadPageCallback will be informed
   // of status. Only one load request may exist as a time. If a previous
   // request is still in progress it must be canceled before a new
   // request will be accepted.
-  bool LoadPage(const GURL& url,
-                content::SessionStorageNamespace* session_storage_namespace,
-                const gfx::Size& size,
-                const LoadPageCallback& callback);
+  virtual bool LoadPage(const GURL& url, const LoadPageCallback& callback);
 
   // Stops (completes or cancels) the load request. Must be called when
   // LoadPageCallback is done with consuming the contents.
   // This loader should also be responsible for stopping offline
   // prerenders when Chrome is transitioned to foreground.
-  void StopLoading();
+  virtual void StopLoading();
 };
 
 }  // namespace offline_pages
 
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_