[Offline Pages on the NTP] Bypass the network interstitial

chrome/browser/android/offline_pages/offline_page_bridge.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/offline_pages/offline_page_bridge.h"
 
 #include <utility>
 
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
@@ skipping 216 matching lines @@
   offline_page_model_->CheckForExternalFileDeletion();
 }
 
 ScopedJavaLocalRef<jstring> OfflinePageBridge::GetOfflineUrlForOnlineUrl(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& j_online_url) {
   GURL online_url(ConvertJavaStringToUTF8(env, j_online_url));
   GURL offline_url =
       OfflinePageUtils::GetOfflineURLForOnlineURL(browser_context_, online_url);
+  if (!offline_url.is_valid())
+    return ScopedJavaLocalRef<jstring>();
   return ConvertUTF8ToJavaString(env, offline_url.spec());
 }
 
 jboolean OfflinePageBridge::IsOfflinePageUrl(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& j_offline_url) {
   GURL offline_url(ConvertJavaStringToUTF8(env, j_offline_url));
   return OfflinePageUtils::IsOfflinePage(browser_context_, offline_url);
 }
@@ skipping 27 matching lines @@
   return reinterpret_cast<jlong>(new OfflinePageBridge(
       env, obj, ProfileAndroid::FromProfileAndroid(j_profile)));
 }
 
 bool RegisterOfflinePageBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace offline_pages