Remove unused DataReductionProxyInfoBar and related code

chrome/browser/net/spdyproxy/data_reduction_proxy_infobar_delegate_android.cc

-// Copyright 2014 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/net/spdyproxy/data_reduction_proxy_infobar_delegate_android.h"
-
-#include <memory>
-
-#include "chrome/browser/infobars/infobar_service.h"
-#include "components/infobars/core/infobar.h"
-#include "components/infobars/core/infobar_delegate.h"
-#include "content/public/browser/web_contents.h"
-#include "grit/components_strings.h"
-#include "ui/base/l10n/l10n_util.h"
-#include "url/gurl.h"
-
-// static
-void DataReductionProxyInfoBarDelegateAndroid::Create(
-    content::WebContents* web_contents,
-    const std::string& link_url) {
-  InfoBarService* infobar_service =
-      InfoBarService::FromWebContents(web_contents);
-  infobar_service->AddInfoBar(
-      DataReductionProxyInfoBarDelegateAndroid::CreateInfoBar(
-          infobar_service,
-          std::unique_ptr<DataReductionProxyInfoBarDelegateAndroid>(
-              new DataReductionProxyInfoBarDelegateAndroid(link_url))));
-}
-
-DataReductionProxyInfoBarDelegateAndroid::
-    ~DataReductionProxyInfoBarDelegateAndroid() {}
-
-DataReductionProxyInfoBarDelegateAndroid::
-    DataReductionProxyInfoBarDelegateAndroid(const std::string& link_url)
-    : ConfirmInfoBarDelegate(), link_url_(link_url) {}
-
-infobars::InfoBarDelegate::InfoBarIdentifier
-DataReductionProxyInfoBarDelegateAndroid::GetIdentifier() const {
-  return DATA_REDUCTION_PROXY_INFOBAR_DELEGATE_ANDROID;
-}
-
-bool DataReductionProxyInfoBarDelegateAndroid::ShouldExpire(
-    const NavigationDetails& details) const {
-  return false;
-}
-
-base::string16 DataReductionProxyInfoBarDelegateAndroid::GetMessageText()
-    const {
-  return base::string16();
-}
-
-int DataReductionProxyInfoBarDelegateAndroid::GetButtons() const {
-  return BUTTON_NONE;
-}
-
-GURL DataReductionProxyInfoBarDelegateAndroid::GetLinkURL() const {
-  return GURL(link_url_);
-}
-
-bool DataReductionProxyInfoBarDelegateAndroid::LinkClicked(
-    WindowOpenDisposition disposition) {
-  ConfirmInfoBarDelegate::LinkClicked(disposition);
-  return true;
-}