[Android Downloads] Long-press menu item "Download Link" should delegate job to OfflinePages backen…

chrome/browser/android/offline_pages/offline_page_utils.cc

Index: chrome/browser/android/offline_pages/offline_page_utils.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_utils.cc b/chrome/browser/android/offline_pages/offline_page_utils.cc
index 485ed4939f813964111499a3fb764fa03d2666d9..91b7a3caa3f673ef82656e43578335ac637fb8f9 100644
--- a/chrome/browser/android/offline_pages/offline_page_utils.cc
+++ b/chrome/browser/android/offline_pages/offline_page_utils.cc
@@ -5,12 +5,14 @@
 #include "chrome/browser/android/offline_pages/offline_page_utils.h"
 
 #include "base/bind.h"
+#include "base/guid.h"
 #include "base/location.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
+#include "chrome/browser/android/offline_pages/downloads/offline_page_notification_bridge.h"
 #include "chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h"
 #include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
 #include "chrome/browser/android/offline_pages/offline_page_tab_helper.h"
@@ -220,4 +222,25 @@ bool OfflinePageUtils::EqualsIgnoringFragment(const GURL& lhs,
   return lhs_stripped == rhs_stripped;
 }
 
+// static
+void OfflinePageUtils::StartOfflinePageDownload(
+    content::BrowserContext* context,
+    const GURL& url) {
+  RequestCoordinator* request_coordinator =
+      RequestCoordinatorFactory::GetForBrowserContext(context);
+
+  // TODO(dimich): Enable in Incognito when Android Downloads implement
+  // Incognito story.
+  if (!request_coordinator)
+    return;
+
+  ClientId client_id(kDownloadNamespace, base::GenerateGUID());
+  request_coordinator->SavePageLater(
+      url, client_id, true,
+      RequestCoordinator::RequestAvailability::ENABLED_FOR_OFFLINER);
+
+  android::OfflinePageNotificationBridge notification_bridge;
+  notification_bridge.ShowDownloadingToast();
+}
+
 }  // namespace offline_pages