Show download error message if sdcard is not available

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 20 matching lines @@
       !item->GetTargetFilePath().empty();
 }
 
 }  // namespace
 
 // static
 bool DownloadManagerService::RegisterDownloadManagerService(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
+// static
+void DownloadManagerService::OnDownloadCanceled(
+    content::DownloadItem* download,
+    DownloadController::DownloadCancelReason reason) {
+  bool has_no_external_storage =
+      (reason == DownloadController::CANCEL_REASON_NO_EXTERNAL_STORAGE);
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jname =
+      ConvertUTF8ToJavaString(env, download->GetURL().ExtractFileName());
+  Java_DownloadManagerService_onDownloadItemCanceled(
+      env, jname.obj(), has_no_external_storage);
+  DownloadController::RecordDownloadCancelReason(reason);
+}
+
+
 static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& jobj) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   DownloadManagerService* service =
       new DownloadManagerService(env, jobj);
   DownloadService* download_service =
       DownloadServiceFactory::GetForBrowserContext(profile);
   DownloadHistory* history = download_service->GetDownloadHistory();
   if (history)
     history->AddObserver(service);
   return reinterpret_cast<intptr_t>(service);
@@ skipping 224 matching lines @@
     resume_callback_for_testing_.Run(false);
 }
 
 content::DownloadManager* DownloadManagerService::GetDownloadManager(
     bool is_off_the_record) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   if (is_off_the_record)
     profile = profile->GetOffTheRecordProfile();
   return content::BrowserContext::GetDownloadManager(profile);
 }