Prefer opening PDF downloads in the browser.

chrome/browser/download/download_shelf_context_menu.cc

Index: chrome/browser/download/download_shelf_context_menu.cc
diff --git a/chrome/browser/download/download_shelf_context_menu.cc b/chrome/browser/download/download_shelf_context_menu.cc
index d2fc2564e87015459297aebe430886d67495338e..a665db344877127f0a3248acd4f32a11c9a3573c 100644
--- a/chrome/browser/download/download_shelf_context_menu.cc
+++ b/chrome/browser/download/download_shelf_context_menu.cc
@@ -79,6 +79,7 @@ bool DownloadShelfContextMenu::IsCommandIdEnabled(int command_id) const {
     case SHOW_IN_FOLDER:
       return download_item_->CanShowInFolder();
     case OPEN_WHEN_COMPLETE:
+    case PLATFORM_OPEN:
       return download_item_->CanOpenDownload() &&
           !download_crx_util::IsExtensionDownload(*download_item_);
     case ALWAYS_OPEN_TYPE:
@@ -138,6 +139,9 @@ void DownloadShelfContextMenu::ExecuteCommand(int command_id, int event_flags) {
         prefs->DisableAutoOpenBasedOnExtension(path);
       break;
     }
+    case PLATFORM_OPEN:
+      DownloadItemModel(download_item_).OpenUsingPlatformHandler();
+      break;
     case CANCEL:
       download_item_->Cancel(true /* Cancelled by user */);
       break;
@@ -221,6 +225,8 @@ string16 DownloadShelfContextMenu::GetLabelForCommandId(int command_id) const {
       return l10n_util::GetStringUTF16(IDS_DOWNLOAD_MENU_OPEN);
     case ALWAYS_OPEN_TYPE:
       return l10n_util::GetStringUTF16(IDS_DOWNLOAD_MENU_ALWAYS_OPEN_TYPE);
+    case PLATFORM_OPEN:
+      return l10n_util::GetStringUTF16(IDS_DOWNLOAD_MENU_PLATFORM_OPEN);
     case CANCEL:
       return l10n_util::GetStringUTF16(IDS_DOWNLOAD_MENU_CANCEL);
     case TOGGLE_PAUSE:
@@ -290,6 +296,9 @@ ui::SimpleMenuModel* DownloadShelfContextMenu::GetFinishedMenuModel() {
       OPEN_WHEN_COMPLETE, IDS_DOWNLOAD_MENU_OPEN);
   finished_download_menu_model_->AddCheckItemWithStringId(
       ALWAYS_OPEN_TYPE, IDS_DOWNLOAD_MENU_ALWAYS_OPEN_TYPE);
+  if (DownloadItemModel(download_item_).ShouldPreferOpeningInBrowser())
+    finished_download_menu_model_->AddItemWithStringId(
+        PLATFORM_OPEN, IDS_DOWNLOAD_MENU_PLATFORM_OPEN);
   finished_download_menu_model_->AddSeparator(ui::NORMAL_SEPARATOR);
   finished_download_menu_model_->AddItemWithStringId(
       SHOW_IN_FOLDER, IDS_DOWNLOAD_MENU_SHOW);