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

chrome/browser/android/download/download_controller.cc

 // Copyright 2016 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_controller.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/synchronization/lock.h"
 #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"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/common/referrer.h"
 #include "jni/DownloadController_jni.h"
 #include "net/base/filename_util.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
 #include "ui/base/page_transition_types.h"
@@ skipping 15 matching lines @@
 WebContents* GetWebContents(int render_process_id, int render_view_id) {
   content::RenderViewHost* render_view_host =
       content::RenderViewHost::FromID(render_process_id, render_view_id);
 
   if (!render_view_host)
     return nullptr;
 
   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,
                                bool is_link,
                                const std::string& extra_headers,
                                bool granted) {
   if (!granted)
     return;
 
   content::WebContents* web_contents =
@@ skipping 16 matching lines @@
   dl_params->set_referrer(referrer);
   if (is_link)
     dl_params->set_referrer_encoding(params.frame_charset);
   net::HttpRequestHeaders headers;
   headers.AddHeadersFromString(extra_headers);
   for (net::HttpRequestHeaders::Iterator it(headers); it.GetNext();)
     dl_params->add_request_header(it.name(), it.value());
   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));
 }
 
 // Check if an interrupted download item can be auto resumed.
 bool IsInterruptedDownloadAutoResumable(content::DownloadItem* download_item) {
   int interrupt_reason = download_item->GetLastReason();
   DCHECK_NE(interrupt_reason, content::DOWNLOAD_INTERRUPT_REASON_NONE);
   return
       interrupt_reason == content::DOWNLOAD_INTERRUPT_REASON_NETWORK_TIMEOUT ||
       interrupt_reason == content::DOWNLOAD_INTERRUPT_REASON_NETWORK_FAILED ||
@@ skipping 221 matching lines @@
 void DownloadController::StartContextMenuDownload(
     const ContextMenuParams& params, WebContents* web_contents, bool is_link,
     const std::string& extra_headers) {
   int process_id = web_contents->GetRenderProcessHost()->GetID();
   int routing_id = web_contents->GetRoutingID();
   AcquireFileAccessPermission(
       web_contents, base::Bind(&CreateContextMenuDownload, process_id,
                                routing_id, params, is_link, extra_headers));
 }