Remove auto raw pointer deduction from non-linux specific code.

chrome/browser/android/instantapps/instant_apps_infobar_delegate.cc

 // 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/instantapps/instant_apps_infobar_delegate.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/user_metrics.h"
@@ skipping 55 matching lines @@
   InstantAppsSettings::RecordInfoBarDismissEvent(web_contents, url_);
   base::RecordAction(base::UserMetricsAction(
       "Android.InstantApps.BannerDismissed"));
 }
 
 void Launch(JNIEnv* env,
             const base::android::JavaParamRef<jclass>& clazz,
             const base::android::JavaParamRef<jobject>& jweb_contents,
             const base::android::JavaParamRef<jobject>& jdata,
             const base::android::JavaParamRef<jstring>& jurl) {
-  auto web_contents = content::WebContents::FromJavaWebContents(jweb_contents);
+  auto* web_contents = content::WebContents::FromJavaWebContents(jweb_contents);
   std::string url(base::android::ConvertJavaStringToUTF8(env, jurl));
   InstantAppsInfoBarDelegate::Create(
       InfoBarService::FromWebContents(web_contents),
       jdata,
       url);
   InstantAppsSettings::RecordInfoBarShowEvent(web_contents, url);
   base::RecordAction(base::UserMetricsAction(
       "Android.InstantApps.BannerShown"));
 }
 
 bool RegisterInstantAppsInfoBarDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }