Revert of Revert of Move SecurityLevel into a class of its own

chrome/browser/ssl/connection_security_helper_android.cc

+// Copyright 2015 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/ssl/connection_security_helper_android.h"
+
+#include "base/logging.h"
+#include "chrome/browser/ssl/connection_security_helper.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/ConnectionSecurityHelper_jni.h"
+
+// static
+bool RegisterConnectionSecurityHelperAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// static
+jint GetSecurityLevelForWebContents(JNIEnv* env,
+                                    jclass jcaller,
+                                    jobject jweb_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(jweb_contents);
+  DCHECK(web_contents);
+  return ConnectionSecurityHelper::GetSecurityLevelForWebContents(web_contents);
+}