[Downloads] Add support for tracking incomplete downloads

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 10 matching lines @@
 #include "ui/base/l10n/l10n_util.h"
 
 using base::android::JavaParamRef;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ScopedJavaLocalRef;
 
 namespace {
 
 bool ShouldShowDownloadItem(content::DownloadItem* item) {
-  return !item->IsTemporary() &&
-      !item->GetFileNameToReportUser().empty() &&
-      !item->GetTargetFilePath().empty() &&
-      item->GetState() != content::DownloadItem::CANCELLED;
+  return !item->IsTemporary();
 }
 
-void updateNotifier(DownloadManagerService* service,
+void UpdateNotifier(DownloadManagerService* service,
                     content::DownloadManager* manager,
                     std::unique_ptr<AllDownloadItemNotifier>& notifier) {
   if (manager) {
     if (!notifier || notifier->GetManager() != manager)
       notifier.reset(new AllDownloadItemNotifier(manager, service));
   } else {
     notifier.reset(nullptr);
   }
 }
 
@@ skipping 221 matching lines @@
   }
   pending_actions_.clear();
 
   // Respond to any requests to get all downloads.
   if (pending_get_downloads_actions_ & REGULAR)
     GetAllDownloadsInternal(false);
   if (pending_get_downloads_actions_ & OFF_THE_RECORD)
     GetAllDownloadsInternal(true);
 
   // Monitor all DownloadItems for changes.
-  updateNotifier(this, GetDownloadManager(false), original_notifier_);
-  updateNotifier(this, GetDownloadManager(true), off_the_record_notifier_);
+  UpdateNotifier(this, GetDownloadManager(false), original_notifier_);
+  UpdateNotifier(this, GetDownloadManager(true), off_the_record_notifier_);
+}
+
+void DownloadManagerService::OnDownloadCreated(
+    content::DownloadManager* manager, content::DownloadItem* item) {
+
+  JNIEnv* env = base::android::AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> j_item = CreateJavaDownloadItem(env, item);
+  Java_DownloadManagerService_onDownloadItemCreated(
+      env, java_ref_.obj(), j_item);
 }
 
 void DownloadManagerService::OnDownloadUpdated(
     content::DownloadManager* manager, content::DownloadItem* item) {
   if (java_ref_.is_null())
     return;
 
+  if (item->IsTemporary())
+    return;
+
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jobject> j_item = CreateJavaDownloadItem(env, item);
   Java_DownloadManagerService_onDownloadItemUpdated(
       env, java_ref_.obj(), j_item);
 }
 
 void DownloadManagerService::OnDownloadRemoved(
     content::DownloadManager* manager, content::DownloadItem* item) {
   if (java_ref_.is_null())
     return;
@@ skipping 115 matching lines @@
 
 content::DownloadManager* DownloadManagerService::GetDownloadManager(
     bool is_off_the_record) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   if (is_off_the_record)
     profile = profile->GetOffTheRecordProfile();
   content::DownloadManager* manager =
       content::BrowserContext::GetDownloadManager(profile);
 
   // Update notifiers to monitor any newly created DownloadManagers.
-  updateNotifier(
+  UpdateNotifier(
       this, manager,
       is_off_the_record ? off_the_record_notifier_ : original_notifier_);
 
   return manager;
 }
 
 // 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);
 }