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

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 "content/common/content_export.h"
@@ skipping 29 matching lines @@
   virtual const GURL& GetURL() = 0;
 
   // Whether the navigation is taking place in the main frame or in a subframe.
   // This remains constant over the navigation lifetime.
   virtual bool IsInMainFrame() = 0;
 
   // Whether the navigation is taking place in a frame that is a direct child
   // of the main frame. This remains constant over the navigation lifetime.
   virtual bool IsParentMainFrame() = 0;
 
+  // Whether the navigation was initated by the renderer process, e.g. if:
+  //  * a website changes window.location.href
+  //  * <meta http-equiv="refresh"> tag

[Charlie Reis, 2016/05/11 21:50:04]

nit: Let's be a bit more explicit that these are just two of many examples,
since I've noticed many people don't know the difference between e.g. and i.e. 
:)

Something like the the comment on IsSynchronousNavigation could work here:

"...by the renderer process.  Examples of renderer-initiated navigations
include:
 * a link click
 * a change to window.location.href
 * <meta http-equiv="refresh"> tag"

[dominickn, 2016/05/12 04:22:58]

Done.

+  virtual bool IsRendererInitiated() = 0;
+
   // Whether the navigation is synchronous or not. Examples of synchronous
   // navigations are:
   // * reference fragment navigations
   // * pushState/popState
   virtual bool IsSynchronousNavigation() = 0;
 
   // Whether the navigation is for an iframe with srcdoc attribute.
   virtual bool IsSrcdoc() = 0;
 
   // Returns the FrameTreeNode ID for the frame in which the navigation is
@@ skipping 106 matching lines @@
   virtual NavigationThrottle::ThrottleCheckResult
   CallWillRedirectRequestForTesting(const GURL& new_url,
                                     bool new_method_is_post,
                                     const GURL& new_referrer_url,
                                     bool new_is_external_protocol) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_