Show download error message if sdcard is not available

chrome/browser/android/download/download_manager_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_
 #define CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_
 
 #include <jni.h>
 #include <map>
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
+#include "chrome/browser/android/download/download_controller.h"
 #include "chrome/browser/download/download_history.h"
 #include "content/public/browser/download_manager.h"
 
 using base::android::JavaParamRef;
 
 namespace content {
 class DownloadItem;
 }
 
 // Native side of DownloadManagerService.java. The native object is owned by its
 // Java object.
 class DownloadManagerService : public DownloadHistory::Observer {
  public:
   // JNI registration.
   static bool RegisterDownloadManagerService(JNIEnv* env);
 
+  static void OnDownloadCanceled(
+      content::DownloadItem* download,
+      DownloadController::DownloadCancelReason reason);
+
   DownloadManagerService(JNIEnv* env,
                          jobject jobj);
   ~DownloadManagerService() override;
 
   // Called to resume downloading the item that has GUID equal to
   // |jdownload_guid|..
   void ResumeDownload(JNIEnv* env,
                       jobject obj,
                       const JavaParamRef<jstring>& jdownload_guid);
 
@@ skipping 54 matching lines @@
 
   void EnqueueDownloadAction(const std::string& download_guid,
                              DownloadAction action);
 
   ResumeCallback resume_callback_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerService);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_DOWNLOAD_MANAGER_SERVICE_H_