Showing previews UI for Offline Previews

chrome/browser/android/tab_android.cc

 // Copyright 2012 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/tab_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 796 matching lines @@
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_Tab_showOfflinePages(env, weak_java_tab_.get(env));
 }
 
 jboolean TabAndroid::IsOfflinePage(JNIEnv* env,
                                    const JavaParamRef<jobject>& obj) {
   return offline_pages::OfflinePageUtils::GetOfflinePageFromWebContents(
       web_contents()) != nullptr;
 }
 
+jboolean TabAndroid::IsShowingOfflinePreview(JNIEnv* env,
+                                             const JavaParamRef<jobject>& obj) {
+  return offline_pages::OfflinePageUtils::IsShowingOfflinePreview(
+      web_contents());
+}
+
 ScopedJavaLocalRef<jobject> TabAndroid::GetOfflinePage(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {
   const offline_pages::OfflinePageItem* offline_page =
       offline_pages::OfflinePageUtils::GetOfflinePageFromWebContents(
           web_contents());
   if (!offline_page)
     return ScopedJavaLocalRef<jobject>();
 
   return offline_pages::android::OfflinePageBridge::ConvertToJavaOfflinePage(
@@ skipping 55 matching lines @@
 static void Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TRACE_EVENT0("native", "TabAndroid::Init");
   // This will automatically bind to the Java object and pass ownership there.
   new TabAndroid(env, obj);
 }
 
 // static
 bool TabAndroid::RegisterTabAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }