[Offline Pages on the NTP] Hide behind a base::Feature

chrome/browser/android/chrome_feature_list.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/android/chrome_feature_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
 #include "base/android/jni_string.h"
 #include "base/feature_list.h"
 #include "base/macros.h"
 #include "jni/ChromeFeatureList_jni.h"
 
 using base::android::ConvertJavaStringToUTF8;
 
 namespace chrome {
 namespace android {
 
 namespace {
 
 // Array of features exposed through the Java ChromeFeatureList API. Entries in
 // this array may either refer to features defined in this file (above) or in
 // other locations in the code base (e.g. chrome/, components/, etc).
 const base::Feature* kFeaturesExposedToJava[] = {
+    &kNTPOfflinePagesFeature,
     &kPhysicalWebFeature,
 };
 
 }  // namespace
 
+const base::Feature kNTPOfflinePagesFeature {
+  "NTPOfflinePages", base::FEATURE_DISABLED_BY_DEFAULT
+};
+
 const base::Feature kPhysicalWebFeature {
   "PhysicalWeb", base::FEATURE_DISABLED_BY_DEFAULT
 };
 
 static jboolean IsEnabled(JNIEnv* env,
                           const JavaParamRef<jclass>& clazz,
                           const JavaParamRef<jstring>& jfeature_name) {
   const std::string feature_name = ConvertJavaStringToUTF8(env, jfeature_name);
   for (size_t i = 0; i < arraysize(kFeaturesExposedToJava); ++i) {
     if (kFeaturesExposedToJava[i]->name == feature_name)
       return base::FeatureList::IsEnabled(*kFeaturesExposedToJava[i]);
   }
   // Features queried via this API must be present in |kFeaturesExposedToJava|.
   NOTREACHED();
   return false;
 }
 
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome