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

chrome/browser/download/download_request_limiter.h

Index: chrome/browser/download/download_request_limiter.h
diff --git a/chrome/browser/download/download_request_limiter.h b/chrome/browser/download/download_request_limiter.h
index caae103f9bc01e355416227d6a128dfa951a8030..778eb8b3224931acb2b6e7bd463c45fc532e8660 100644
--- a/chrome/browser/download/download_request_limiter.h
+++ b/chrome/browser/download/download_request_limiter.h
@@ -106,9 +106,10 @@ class DownloadRequestLimiter
     }
 
     // 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;