Block renderer-initiated main frame navigations to data URLs

content/public/browser/navigation_handle.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 165 matching lines @@
   virtual const std::vector<GURL>& GetRedirectChain() = 0;
 
   // Whether the navigation has committed. Navigations that end up being
   // downloads or return 204/205 response codes do not commit (i.e. the
   // WebContents stays at the existing URL).
   // This returns true for either successful commits or error pages that
   // replace the previous page (distinguished by |IsErrorPage|), and false for
   // errors that leave the user on the previous page.
   virtual bool HasCommitted() = 0;
 
+  // Whether the navigation request is a download. This is useful when the
+  // navigation hasn't committed yet, in which case HasCommitted() will return
+  // false even if the navigation request is not a download.
+  virtual bool IsDownload() = 0;

[nasko, 2017/03/30 23:15:45]

We don't need to expose this method at this time, as I didn't see any callers
outside of content/ for now.

[meacer, 2017/04/05 22:33:28]

Done.

+
   // Whether the navigation resulted in an error page.
   // Note that if an error page reloads, this will return true even though
   // GetNetErrorCode will be net::OK.
   virtual bool IsErrorPage() = 0;
 
   // Not all committed subframe navigations (i.e., !IsInMainFrame &&
   // HasCommitted) end up causing a change of the current NavigationEntry. For
   // example, some users of NavigationHandle may want to ignore the initial
   // commit in a newly added subframe or location.replace events in subframes
   // (e.g., ads), while still reacting to user actions like link clicks and
@@ skipping 99 matching lines @@
 
   // The NavigationData that the embedder returned from
   // ResourceDispatcherHostDelegate::GetNavigationData during commit. This will
   // be a clone of the NavigationData.
   virtual NavigationData* GetNavigationData() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_