Navigation throttle for the Safe Browsing Subresource Filter.

content/public/browser/navigation_handle.h

Index: content/public/browser/navigation_handle.h
diff --git a/content/public/browser/navigation_handle.h b/content/public/browser/navigation_handle.h
index 24a500ff82b6d3859511ed8ea76a99b5f228291f..e4e2e1472159f76b3224f4c7adb925e0d79443ed 100644
--- a/content/public/browser/navigation_handle.h
+++ b/content/public/browser/navigation_handle.h
@@ -125,7 +125,11 @@ class CONTENT_EXPORT NavigationHandle {
   virtual net::Error GetNetErrorCode() = 0;
 
   // Returns the RenderFrameHost this navigation is taking place in. This can
-  // only be accessed after the navigation is ready to commit.
+  // only be accessed after the navigation starts processing the response.
+  // The RenderFrameHost returned back might not be the final one, because the
+  // navigation may transfer so final RenderFrameHost is not available before
+  // DidFinishNavigation.
+  // If PlzNavigate is enabled, then RenderFrameHost is final.
   virtual RenderFrameHost* GetRenderFrameHost() = 0;
 
   // Whether the navigation happened in the same page. This is only known
@@ -187,6 +191,10 @@ class CONTENT_EXPORT NavigationHandle {
                                     const GURL& new_referrer_url,
                                     bool new_is_external_protocol) = 0;
 
+  // Simulates that throttle is about to process the response.
+  virtual NavigationThrottle::ThrottleCheckResult
+  CallWillProcessResponseForTesting(RenderFrameHost* render_frame_host) = 0;
+
   // The NavigationData that the embedder returned from
   // ResourceDispatcherHostDelegate::GetNavigationData during commit. This will
   // be a clone of the NavigationData.