(Try 2) InstantExtended: remove dead code related to the non-cacheable NTP.

chrome/browser/ui/search/instant_loader.cc

-// Copyright 2012 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/ui/search/instant_loader.h"
-
-#include "chrome/browser/content_settings/tab_specific_content_settings.h"
-#include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
-#include "chrome/browser/favicon/favicon_tab_helper.h"
-#include "chrome/browser/safe_browsing/safe_browsing_tab_observer.h"
-#include "chrome/browser/search/search.h"
-#include "chrome/browser/tab_contents/tab_util.h"
-#include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
-#include "chrome/browser/ui/search/search_tab_helper.h"
-#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/site_instance.h"
-#include "content/public/browser/web_contents_view.h"
-#include "grit/generated_resources.h"
-#include "ui/base/l10n/l10n_util.h"
-
-#if !defined(OS_ANDROID)
-#include "chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h"
-#endif
-
-namespace {
-
-// This HTTP header and value are set on loads that originate from Instant.
-const char kInstantHeader[] = "X-Purpose: Instant";
-
-}  // namespace
-
-InstantLoader::Delegate::~Delegate() {
-}
-
-InstantLoader::InstantLoader(Delegate* delegate)
-    : delegate_(delegate), stale_page_timer_(false, false) {}
-
-InstantLoader::~InstantLoader() {
-}
-
-void InstantLoader::Init(const GURL& instant_url,
-                         Profile* profile,
-                         const base::Closure& on_stale_callback) {
-  content::WebContents::CreateParams create_params(profile);
-  create_params.site_instance = content::SiteInstance::CreateForURL(
-      profile, instant_url);
-  SetContents(scoped_ptr<content::WebContents>(
-      content::WebContents::Create(create_params)));
-  instant_url_ = instant_url;
-  on_stale_callback_ = on_stale_callback;
-}
-
-void InstantLoader::Load() {
-  DVLOG(1) << "LoadURL: " << instant_url_;
-  contents_->GetController().LoadURL(
-      instant_url_, content::Referrer(),
-      content::PAGE_TRANSITION_GENERATED, kInstantHeader);
-
-  // Explicitly set the new tab title and virtual URL.
-  //
-  // This ensures that the title is set even before we get a title from the
-  // page, preventing a potential flicker of the URL, and also ensures that
-  // (unless overridden by the page) the new tab title matches the browser UI
-  // locale.
-  content::NavigationEntry* entry =
-      contents_->GetController().GetVisibleEntry();
-  if (entry)
-    entry->SetTitle(l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE));
-
-  contents_->WasHidden();
-
-  int staleness_timeout_ms = chrome::GetInstantLoaderStalenessTimeoutSec() *
-      1000;
-  if (staleness_timeout_ms > 0) {
-    stale_page_timer_.Start(
-        FROM_HERE,
-        base::TimeDelta::FromMilliseconds(staleness_timeout_ms),
-        on_stale_callback_);
-  }
-}
-
-void InstantLoader::SetContents(scoped_ptr<content::WebContents> new_contents) {
-  contents_.reset(new_contents.release());
-  contents_->SetDelegate(this);
-
-  // Set up various tab helpers. The rest will get attached when (if) the
-  // contents is added to the tab strip.
-
-  // Bookmarks (Users can bookmark the Instant NTP. This ensures the bookmarked
-  // state is correctly set when the contents are swapped into a tab.)
-  BookmarkTabHelper::CreateForWebContents(contents());
-
-  // A tab helper to catch prerender content swapping shenanigans.
-  CoreTabHelper::CreateForWebContents(contents());
-  CoreTabHelper::FromWebContents(contents())->set_delegate(this);
-
-  SearchTabHelper::CreateForWebContents(contents());
-
-#if !defined(OS_ANDROID)
-  // Observers.
-  extensions::WebNavigationTabObserver::CreateForWebContents(contents());
-#endif  // OS_ANDROID
-
-  // Favicons, required by the Task Manager.
-  FaviconTabHelper::CreateForWebContents(contents());
-
-  // And some flat-out paranoia.
-  safe_browsing::SafeBrowsingTabObserver::CreateForWebContents(contents());
-
-  // When the WebContents finishes loading it should be checked to ensure that
-  // it is in the instant process.
-  registrar_.Add(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
-                 content::Source<content::WebContents>(contents_.get()));
-}
-
-scoped_ptr<content::WebContents> InstantLoader::ReleaseContents() {
-  stale_page_timer_.Stop();
-  contents_->SetDelegate(NULL);
-
-  // Undo tab helper work done in SetContents().
-  CoreTabHelper::FromWebContents(contents())->set_delegate(NULL);
-
-  registrar_.Remove(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
-                    content::Source<content::WebContents>(contents_.get()));
-  return contents_.Pass();
-}
-
-void InstantLoader::Observe(int type,
-                            const content::NotificationSource& source,
-                            const content::NotificationDetails& details) {
-  DCHECK_EQ(type, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME);
-  const content::WebContents* web_contents =
-      content::Source<content::WebContents>(source).ptr();
-  DCHECK_EQ(contents_.get(), web_contents);
-  delegate_->LoadCompletedMainFrame();
-}
-
-void InstantLoader::SwapTabContents(content::WebContents* old_contents,
-                                    content::WebContents* new_contents) {
-  DCHECK_EQ(old_contents, contents());
-  // We release here without deleting since the caller has the responsibility
-  // for deleting the old WebContents.
-  ignore_result(ReleaseContents().release());
-  SetContents(scoped_ptr<content::WebContents>(new_contents));
-  delegate_->OnSwappedContents();
-}
-
-bool InstantLoader::ShouldSuppressDialogs() {
-  // Messages shown during Instant cancel Instant, so we suppress them.
-  return true;
-}
-
-bool InstantLoader::ShouldFocusPageAfterCrash() {
-  return false;
-}
-
-void InstantLoader::CanDownload(content::RenderViewHost* /* render_view_host */,
-                                int /* request_id */,
-                                const std::string& /* request_method */,
-                                const base::Callback<void(bool)>& callback) {
-  // Downloads are disabled.
-  callback.Run(false);
-}
-
-bool InstantLoader::OnGoToEntryOffset(int /* offset */) {
-  return false;
-}
-
-content::WebContents* InstantLoader::OpenURLFromTab(
-    content::WebContents* source,
-    const content::OpenURLParams& params) {
-  return delegate_->OpenURLFromTab(source, params);
-}