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

chrome/browser/android/download/download_controller.cc

Index: chrome/browser/android/download/download_controller.cc
diff --git a/chrome/browser/android/download/download_controller.cc b/chrome/browser/android/download/download_controller.cc
index b90f310a7ee54d36a469ac3fbdba5da41087979e..4e0a5edc7aff6462887ed0defcde78c086e45635 100644
--- a/chrome/browser/android/download/download_controller.cc
+++ b/chrome/browser/android/download/download_controller.cc
@@ -18,10 +18,12 @@
 #include "chrome/browser/android/download/chrome_download_delegate.h"
 #include "chrome/browser/android/download/dangerous_download_infobar_delegate.h"
 #include "chrome/browser/android/download/download_manager_service.h"
+#include "chrome/browser/android/offline_pages/offline_page_utils.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/ui/android/view_android_helper.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_manager.h"
 #include "content/public/browser/download_url_parameters.h"
 #include "content/public/browser/render_process_host.h"
@@ -57,6 +59,19 @@ WebContents* GetWebContents(int render_process_id, int render_view_id) {
   return WebContents::FromRenderViewHost(render_view_host);
 }
 
+void DownloadItemCreationCallback(
+    BrowserContext* context,
+    const GURL& url,
+    DownloadItem* item,
+    content::DownloadInterruptReason interrupt_reason) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (interrupt_reason !=
+      content::DOWNLOAD_INTERRUPT_REASON_PAGE_DOWNLOAD_HANDOFF) {
+    return;
+  }
+  offline_pages::OfflinePageUtils::CreateOfflinePageDownload(context, url);
+}
+
 void CreateContextMenuDownload(int render_process_id,
                                int render_view_id,
                                const content::ContextMenuParams& params,
@@ -93,6 +108,9 @@ void CreateContextMenuDownload(int render_process_id,
   if (!is_link && extra_headers.empty())
     dl_params->set_prefer_cache(true);
   dl_params->set_prompt(false);
+  dl_params->set_callback(base::Bind(DownloadItemCreationCallback,
+                                     web_contents->GetBrowserContext(),
+                                     dl_params->url()));
   dlm->DownloadUrl(std::move(dl_params));
 }