<webview>: Move download permission to chrome

chrome/browser/guestview/webview/webview_guest.h

Index: chrome/browser/guestview/webview/webview_guest.h
diff --git a/chrome/browser/guestview/webview/webview_guest.h b/chrome/browser/guestview/webview/webview_guest.h
index 8561275b40edf098cf3e0302216a3ccb044b2f6e..0a076b1855557a04a5657116414cf772315f9be2 100644
--- a/chrome/browser/guestview/webview/webview_guest.h
+++ b/chrome/browser/guestview/webview/webview_guest.h
@@ -84,6 +84,9 @@ class WebViewGuest : public GuestView,
   virtual void RequestMediaAccessPermission(
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) OVERRIDE;
+  virtual void CanDownload(const std::string& request_method,
+                           const GURL& url,
+                           const base::Callback<void(bool)>& callback) OVERRIDE;
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
@@ -132,6 +135,11 @@ class WebViewGuest : public GuestView,
       bool allow,
       const std::string& user_input);
 
+  void OnWebViewDownloadPermissionResponse(
+      const base::Callback<void(bool)>& callback,
+      bool allow,
+      const std::string& user_input);
+
   enum PermissionResponseAction {
     DENY,
     ALLOW,