Remove webContents check when download starts

chrome/browser/android/download/chrome_download_delegate.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/download/chrome_download_delegate.h"
 
 #include <jni.h>
 
 #include <string>
 #include <type_traits>
@@ skipping 65 matching lines @@
 
 ChromeDownloadDelegate::~ChromeDownloadDelegate() {
    JNIEnv* env = base::android::AttachCurrentThread();
    env->DeleteGlobalRef(java_ref_);
 }
 
 void ChromeDownloadDelegate::SetJavaRef(JNIEnv* env, jobject jobj) {
   java_ref_ = env->NewGlobalRef(jobj);
 }
 
-void ChromeDownloadDelegate::OnDownloadStarted(const std::string& filename) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  ScopedJavaLocalRef<jstring> jfilename = ConvertUTF8ToJavaString(
-      env, filename);
-  Java_ChromeDownloadDelegate_onDownloadStarted(env, java_ref_, jfilename);
-}
-
 void ChromeDownloadDelegate::EnqueueDownloadManagerRequest(
     const std::string& url,
     const std::string& user_agent,
     const base::string16& file_name,
     const std::string& mime_type,
     const std::string& cookie,
     const std::string& referer) {
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jstring> jurl =
       ConvertUTF8ToJavaString(env, url);
@@ skipping 18 matching lines @@
   auto* web_contents = WebContents::FromJavaWebContents(jweb_contents);
   ChromeDownloadDelegate::CreateForWebContents(web_contents);
   ChromeDownloadDelegate::FromWebContents(web_contents)->SetJavaRef(env, obj);
 }
 
 bool RegisterChromeDownloadDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(ChromeDownloadDelegate);