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

chrome/browser/ui/search/instant_ntp_prerenderer.h

-// Copyright 2013 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_UI_SEARCH_INSTANT_NTP_PRERENDERER_H_
-#define CHROME_BROWSER_UI_SEARCH_INSTANT_NTP_PRERENDERER_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/prefs/pref_change_registrar.h"
-#include "chrome/browser/search/instant_service_observer.h"
-#include "chrome/browser/ui/search/instant_page.h"
-#include "content/public/browser/web_contents.h"
-#include "net/base/network_change_notifier.h"
-
-class InstantNTP;
-class InstantService;
-class PrefService;
-class Profile;
-
-// InstantNTPPrerenderer maintains a prerendered instance of InstantNTP.
-//
-// An InstantNTP instance is a preloaded search page that will be swapped-in the
-// next time when the user navigates to the New Tab Page. It is never shown to
-// the user in an uncommitted state. It is backed by a WebContents and that is
-// owned by InstantNTP.
-//
-// InstantNTPPrerenderer is owned by InstantService.
-class InstantNTPPrerenderer
-    : public InstantPage::Delegate,
-      public net::NetworkChangeNotifier::NetworkChangeObserver,
-      public InstantServiceObserver {
- public:
-  InstantNTPPrerenderer(Profile* profile, InstantService* instant_service,
-      PrefService* prefs);
-  virtual ~InstantNTPPrerenderer();
-
-  // Preloads |ntp_| with a new InstantNTP.
-  void ReloadInstantNTP();
-
-  // Releases and returns the InstantNTP WebContents. May be NULL. Loads a new
-  // WebContents for the InstantNTP.
-  scoped_ptr<content::WebContents> ReleaseNTPContents() WARN_UNUSED_RESULT;
-
-  // The NTP WebContents. May be NULL. InstantNTPPrerenderer retains ownership.
-  content::WebContents* GetNTPContents() const;
-
-  // Invoked to null out |ntp_|.
-  void DeleteNTPContents();
-
-  // Invoked when the InstantNTP renderer process crashes.
-  void RenderProcessGone();
-
-  // Invoked when the |ntp_| main frame load completes.
-  void LoadCompletedMainFrame();
-
- protected:
-  // Returns the local Instant URL. (Just a convenience wrapper to get the local
-  // Instant URL from InstantService.)
-  virtual std::string GetLocalInstantURL() const;
-
-  // Returns the correct Instant URL to use from the following possibilities:
-  //     o The default search engine's Instant URL.
-  //     o The local page (see GetLocalInstantURL())
-  // Returns an empty string if no valid Instant URL is available (this is only
-  // possible in non-extended mode where we don't have a local page fall-back).
-  virtual std::string GetInstantURL() const;
-
-  // Returns true if Javascript is enabled and false otherwise.
-  virtual bool IsJavascriptEnabled() const;
-
-  // Returns true if the browser is in startup.
-  virtual bool InStartup() const;
-
-  // Accessors are made protected for testing purposes.
-  virtual InstantNTP* ntp() const;
-
-  Profile* profile() const {
-    return profile_;
-  }
-
- private:
-  friend class InstantExtendedTest;
-  friend class InstantNTPPrerendererTest;
-  friend class InstantTestBase;
-
-  FRIEND_TEST_ALL_PREFIXES(InstantExtendedNetworkTest,
-                           NTPReactsToNetworkChanges);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           PrefersRemoteNTPOnStartup);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           SwitchesToLocalNTPIfNoInstantSupport);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           SwitchesToLocalNTPIfPathBad);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           DoesNotSwitchToLocalNTPIfOnCurrentNTP);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           DoesNotSwitchToLocalNTPIfOnLocalNTP);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           SwitchesToLocalNTPIfJSDisabled);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           SwitchesToLocalNTPIfNoNTPReady);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           IsJavascriptEnabled);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           IsJavascriptEnabledChecksContentSettings);
-  FRIEND_TEST_ALL_PREFIXES(InstantNTPPrerendererTest,
-                           IsJavascriptEnabledChecksPrefs);
-  FRIEND_TEST_ALL_PREFIXES(InstantExtendedManualTest, MANUAL_ShowsGoogleNTP);
-  FRIEND_TEST_ALL_PREFIXES(InstantExtendedManualTest,
-                           MANUAL_SearchesFromFakebox);
-  FRIEND_TEST_ALL_PREFIXES(InstantExtendedTest, ProcessIsolation);
-
-  // Overridden from net::NetworkChangeNotifier::NetworkChangeObserver:
-  // If the network status changes, resets InstantNTP.
-  virtual void OnNetworkChanged(net::NetworkChangeNotifier::ConnectionType type)
-      OVERRIDE;
-
-  // Overridden from InstantPage::Delegate:
-  virtual void InstantSupportDetermined(const content::WebContents* contents,
-                                        bool supports_instant) OVERRIDE;
-  virtual void InstantPageAboutToNavigateMainFrame(
-      const content::WebContents* contents,
-      const GURL& url) OVERRIDE;
-  virtual void InstantPageLoadFailed(content::WebContents* contents) OVERRIDE;
-
-  // Overridden from InstantServiceObserver:
-  virtual void DefaultSearchProviderChanged() OVERRIDE;
-  virtual void GoogleURLUpdated() OVERRIDE;
-
-  // Recreates |ntp_| using |instant_url|.
-  void ResetNTP(const std::string& instant_url);
-
-  // Returns true if |ntp_| has an up-to-date Instant URL and supports Instant.
-  // Note that local URLs will not pass this check.
-  bool PageIsCurrent() const;
-
-  // Returns true if we should switch to using the local NTP.
-  bool ShouldSwitchToLocalNTP() const;
-
-  Profile* profile_;
-
-  // Preloaded InstantNTP.
-  scoped_ptr<InstantNTP> ntp_;
-
-  PrefChangeRegistrar profile_pref_registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(InstantNTPPrerenderer);
-};
-
-#endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_NTP_PRERENDERER_H_