MacViews: Enable views based Download recovery dialog behind secondary-ui-md flag.

chrome/browser/download/download_danger_prompt.h

Index: chrome/browser/download/download_danger_prompt.h
diff --git a/chrome/browser/download/download_danger_prompt.h b/chrome/browser/download/download_danger_prompt.h
index 5984adf3637174e73625669a0685c2ef5f92bfaf..5c3bb4107c89d43b89c74f1d2eac7884048eedc1 100644
--- a/chrome/browser/download/download_danger_prompt.h
+++ b/chrome/browser/download/download_danger_prompt.h
@@ -33,14 +33,14 @@ class DownloadDangerPrompt {
   };
   typedef base::Callback<void(Action)> OnDone;
 
-  // Return a new self-deleting DownloadDangerPrompt. |accepted| or |canceled|
-  // will be run when the the respective action is invoked. |canceled| may also
-  // be called when |item| is either no longer dangerous or no longer in
-  // progress, or if the tab corresponding to |web_contents| is
-  // closing. The returned DownloadDangerPrompt* is only used for testing. The
-  // caller does not own the object and receive no guarantees about lifetime.
-  // If |show_context|, then the prompt message will contain some information
-  // about the download and its danger; otherwise it won't.
+  // Return a new self-deleting DownloadDangerPrompt. The returned
+  // DownloadDangerPrompt* is only used for testing. The caller does not own the
+  // object and receives no guarantees about lifetime. If |show_context|, then
+  // the prompt message will contain some information about the download and its
+  // danger; otherwise it won't. |done| is a callback called when the ACCEPT,
+  // CANCEL or DISMISS action is invoked. |done| may be called with the CANCEL
+  // action even when |item| is either no longer dangerous or no longer in
+  // progress, or if the tab corresponding to |web_contents| is closing.
   static DownloadDangerPrompt* Create(content::DownloadItem* item,
                                       content::WebContents* web_contents,
                                       bool show_context,
@@ -65,6 +65,14 @@ class DownloadDangerPrompt {
   // Records UMA stats for a download danger prompt event.
   static void RecordDownloadDangerPrompt(bool did_proceed,
                                          const content::DownloadItem& download);
+
+ private:
+  // Returns a toolkit-views based download danger prompt.
+  static DownloadDangerPrompt* CreateDownloadDangerPromptViews(
+      content::DownloadItem* item,
+      content::WebContents* web_contents,
+      bool show_context,
+      const OnDone& done);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_DANGER_PROMPT_H_