Fix an issue that opening a download with remapped MIME type will launch an intent

chrome/browser/android/download/download_manager_service.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/download_manager_service.h"
 
 #include "base/android/jni_string.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 131 matching lines @@
     jobject obj,
     const JavaParamRef<jstring>& jdownload_guid,
     bool is_off_the_record) {
   std::string download_guid = ConvertJavaStringToUTF8(env, jdownload_guid);
   if (is_history_query_complete_ || is_off_the_record)
     RemoveDownloadInternal(download_guid, is_off_the_record);
   else
     EnqueueDownloadAction(download_guid, REMOVE);
 }
 
-bool DownloadManagerService::IsDownloadOpenableInBrowser(
-    JNIEnv* env,
-    jobject obj,
-    const JavaParamRef<jstring>& jdownload_guid,
-    bool is_off_the_record) {
-  std::string download_guid = ConvertJavaStringToUTF8(env, jdownload_guid);
-  content::DownloadManager* manager = GetDownloadManager(is_off_the_record);
-  if (!manager)
-    return false;
-
-  content::DownloadItem* item = manager->GetDownloadByGuid(download_guid);
-  if (!item)
-    return false;
-
-  return mime_util::IsSupportedMimeType(item->GetMimeType());
-}
-
 void DownloadManagerService::GetAllDownloads(JNIEnv* env,
                                              const JavaParamRef<jobject>& obj,
                                              bool is_off_the_record) {
   if (is_history_query_complete_)
     GetAllDownloadsInternal(is_off_the_record);
   else if (is_off_the_record)
     pending_get_downloads_actions_ |= OFF_THE_RECORD;
   else
     pending_get_downloads_actions_ |= REGULAR;
 }
@@ skipping 266 matching lines @@
 }
 
 // static
 jboolean IsSupportedMimeType(
     JNIEnv* env,
     const JavaParamRef<jclass>& clazz,
     const JavaParamRef<jstring>& jmime_type) {
   std::string mime_type = ConvertJavaStringToUTF8(env, jmime_type);
   return mime_util::IsSupportedMimeType(mime_type);
 }