Persist prompt/block download limiter state on renderer-initiated loads.

chrome/browser/download/download_request_limiter.h

 // Copyright (c) 2012 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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_LIMITER_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_LIMITER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 88 matching lines @@
 
     // Number of "ALLOWED" downloads.
     void increment_download_count() {
       download_count_++;
     }
     size_t download_count() const {
       return download_count_;
     }
 
     // content::WebContentsObserver overrides.
-    void DidNavigateMainFrame(
-        const content::LoadCommittedDetails& details,
-        const content::FrameNavigateParams& params) override;
+    void DidStartNavigation(
+        content::NavigationHandle* navigation_handle) override;
+    void DidFinishNavigation(
+        content::NavigationHandle* navigation_handle) override;
     // Invoked when a user gesture occurs (mouse click, mouse scroll, tap, or
     // key down). This may result in invoking Remove on DownloadRequestLimiter.
     void DidGetUserInteraction(const blink::WebInputEvent::Type type) override;
     void WebContentsDestroyed() override;
 
     // Asks the user if they really want to allow the download.
     // See description above CanDownloadOnIOThread for details on lifetime of
     // callback.
     void PromptUserForDownload(
         const DownloadRequestLimiter::Callback& callback);
@@ skipping 121 matching lines @@
   StateMap state_map_;
 
   // Weak ptr factory used when |CanDownload| asks the delegate asynchronously
   // about the download.
   base::WeakPtrFactory<DownloadRequestLimiter> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadRequestLimiter);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_LIMITER_H_