Don't delete the current NavigationEntry when leaving an interstitial page.

BUG=107182
TEST=See bug

Review URL: http://codereview.chromium.org/8976014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@115189 0039d316-1c4b-4281-b951-d872f2087c98
void SafeBrowsingBlockingPage::SetReportingPreference(bool report) {
  Profile* profile = Profile::FromBrowserContext(tab()->browser_context());
  PrefService* pref = profile->GetPrefs();
  pref->SetBoolean(prefs::kSafeBrowsingReportingEnabled, report);
}

void SafeBrowsingBlockingPage::SetReportingPreference(bool report) {
  Profile* profile = Profile::FromBrowserContext(tab()->browser_context());
  PrefService* pref = profile->GetPrefs();
  pref->SetBoolean(prefs::kSafeBrowsingReportingEnabled, report);
}
