Showing previews UI for Offline Previews

chrome/browser/android/tab_android.h

Index: chrome/browser/android/tab_android.h
diff --git a/chrome/browser/android/tab_android.h b/chrome/browser/android/tab_android.h
index 256ff70aa9519c3a49bf458a8ea5e4cd950ed424..bc7c7ef2bacf3dcbde72282863b1c84a90dbe3b6 100644
--- a/chrome/browser/android/tab_android.h
+++ b/chrome/browser/android/tab_android.h
@@ -233,20 +233,24 @@ class TabAndroid : public CoreTabHelperDelegate,
   jlong GetBookmarkId(JNIEnv* env,
                       const base::android::JavaParamRef<jobject>& obj,
                       jboolean only_editable);
 
   jboolean HasOfflineCopy(JNIEnv* env,
                           const base::android::JavaParamRef<jobject>& obj);
 
   jboolean IsOfflinePage(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& obj);
 
+  jboolean IsShowingOfflinePreview(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj);
+
   base::android::ScopedJavaLocalRef<jobject> GetOfflinePage(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
 
   void SetInterceptNavigationDelegate(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& delegate);
 
   // TODO(dtrainor): Remove this, pull content_layer() on demand.