Revert of Showing previews UI for Offline Previews

chrome/browser/android/offline_pages/offline_page_bridge.cc

Index: chrome/browser/android/offline_pages/offline_page_bridge.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.cc b/chrome/browser/android/offline_pages/offline_page_bridge.cc
index 0c97c7e235f997cb8d532f076feffe2216901bb3..41a74dae994067c082d2aa599271076a4b94c78a 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.cc
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.cc
@@ -501,17 +501,6 @@
       env, offline_header_for_reload.GetCompleteHeaderString()));
 }
 
-jboolean OfflinePageBridge::IsShowingOfflinePreview(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj,
-    const JavaParamRef<jobject>& j_web_contents) {
-  content::WebContents* web_contents =
-      content::WebContents::FromJavaWebContents(j_web_contents);
-  if (!web_contents)
-    return false;
-  return offline_pages::OfflinePageUtils::IsShowingOfflinePreview(web_contents);
-}
-
 void OfflinePageBridge::GetRequestsInQueue(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,