Revert of PrerenderingLoader initial integration with PrerenderManager/PrerenderHandle

chrome/browser/android/offline_pages/prerender_adapter.cc

Index: chrome/browser/android/offline_pages/prerender_adapter.cc
diff --git a/chrome/browser/android/offline_pages/prerender_adapter.cc b/chrome/browser/android/offline_pages/prerender_adapter.cc
deleted file mode 100644
index 031314981274d1e0ad11ebb66c641c4fb6197515..0000000000000000000000000000000000000000
--- a/chrome/browser/android/offline_pages/prerender_adapter.cc
+++ /dev/null
@@ -1,103 +0,0 @@
-// 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/android/offline_pages/prerender_adapter.h"
-
-#include "chrome/browser/prerender/prerender_manager.h"
-#include "chrome/browser/prerender/prerender_manager_factory.h"
-#include "chrome/browser/profiles/profile.h"
-#include "content/public/browser/browser_context.h"
-#include "content/public/browser/web_contents.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace offline_pages {
-
-PrerenderAdapter::Observer::Observer() {}
-PrerenderAdapter::Observer::~Observer() {}
-
-PrerenderAdapter::PrerenderAdapter(PrerenderAdapter::Observer* observer)
-    : observer_(observer) {
-  DCHECK(observer);
-}
-
-PrerenderAdapter::~PrerenderAdapter() {
-  if (IsActive())
-    DestroyActive();
-}
-
-bool PrerenderAdapter::CanPrerender() const {
-  return prerender::PrerenderManager::ActuallyPrerendering();
-}
-
-bool PrerenderAdapter::StartPrerender(
-    content::BrowserContext* browser_context,
-    const GURL& url,
-    content::SessionStorageNamespace* session_storage_namespace,
-    const gfx::Size& size) {
-  DCHECK(!IsActive());
-  DCHECK(CanPrerender());
-
-  Profile* profile = Profile::FromBrowserContext(browser_context);
-  prerender::PrerenderManager* manager =
-      prerender::PrerenderManagerFactory::GetForProfile(profile);
-  DCHECK(manager);
-
-  // Start prerendering the url and capture the handle for the prerendering.
-  active_handle_.reset(
-      manager->AddPrerenderForOffline(url, session_storage_namespace, size));
-  if (!active_handle_)
-    return false;
-
-  active_handle_->SetObserver(this);
-  return true;
-}
-
-content::WebContents* PrerenderAdapter::GetWebContents() const {
-  DCHECK(IsActive());
-  DCHECK(active_handle_->contents());
-  // Note: the prerender stack maintains ownership of these contents
-  // and PrerenderingLoader::StopLoading() must be called to report
-  // the Loader is done with the contents.
-  return active_handle_->contents()->prerender_contents();
-}
-
-prerender::FinalStatus PrerenderAdapter::GetFinalStatus() const {
-  DCHECK(IsActive());
-  DCHECK(active_handle_->contents());
-  return active_handle_->contents()->final_status();
-}
-
-bool PrerenderAdapter::IsActive() const {
-  return active_handle_.get();
-}
-
-void PrerenderAdapter::DestroyActive() {
-  DCHECK(IsActive());
-  active_handle_->OnCancel();
-  active_handle_.reset(nullptr);
-}
-
-void PrerenderAdapter::OnPrerenderStart(prerender::PrerenderHandle* handle) {
-  DCHECK(active_handle_.get() == handle);
-  observer_->OnPrerenderStart();
-}
-
-void PrerenderAdapter::OnPrerenderStopLoading(
-    prerender::PrerenderHandle* handle) {
-  DCHECK(active_handle_.get() == handle);
-  observer_->OnPrerenderDomContentLoaded();
-}
-
-void PrerenderAdapter::OnPrerenderDomContentLoaded(
-    prerender::PrerenderHandle* handle) {
-  DCHECK(active_handle_.get() == handle);
-  observer_->OnPrerenderDomContentLoaded();
-}
-
-void PrerenderAdapter::OnPrerenderStop(prerender::PrerenderHandle* handle) {
-  DCHECK(active_handle_.get() == handle);
-  observer_->OnPrerenderStop();
-}
-
-}  // namespace offline_pages