Handling new frames and frame navigations with find-in-page during a find session.

content/browser/find_request_manager.h

 // Copyright 2016 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_BROWSER_FIND_REQUEST_MANAGER_H_
 #define CONTENT_BROWSER_FIND_REQUEST_MANAGER_H_
 
 #include <queue>
 #include <unordered_map>
 #include <unordered_set>
@@ skipping 85 matching lines @@
     blink::WebFindOptions options;
 
     FindRequest() = default;
     FindRequest(int id,
                 const base::string16& search_text,
                 const blink::WebFindOptions& options)
         : id(id), search_text(search_text), options(options) {}
   };
 
   // WebContentsObserver implementation.
+  void DidFinishLoad(RenderFrameHost* rfh, const GURL& validated_url) override;
   void RenderFrameDeleted(RenderFrameHost* rfh) override;
   void RenderFrameHostChanged(RenderFrameHost* old_host,
                               RenderFrameHost* new_host) override;
   void FrameDeleted(RenderFrameHost* rfh) override;
 
   // Resets all of the per-session state for a new find-in-page session.
   void Reset(const FindRequest& initial_request);
 
   // Called internally as find requests come up in the queue.
   void FindInternal(const FindRequest& request);
@@ skipping 22 matching lines @@
   // then the traversal can wrap around past the last frame to the first one (or
   // vice-versa, if |forward| == false). If no frame can be found under these
   // conditions, nullptr is returned.
   RenderFrameHost* Traverse(RenderFrameHost* from_rfh,
                             bool forward,
                             bool matches_only,
                             bool wrap) const;
 
   // Adds a frame to the set of frames that are being searched. The new frame
   // will automatically be searched when added, using the same options (stored
-  // in |current_request_.options|).
-  void AddFrame(RenderFrameHost* rfh);
+  // in |current_request_.options|). |force| should be set to true when a
+  // dynamic content change is suspected, which will treat the frame as a newly
+  // added frame even if it has already been searched. This will force a
+  // re-search of the frame.
+  void AddFrame(RenderFrameHost* rfh, bool force);
 
   // Returns whether |rfh| is in the set of frames being searched in the current
   // find session.
   bool CheckFrame(RenderFrameHost* rfh) const;
 
   // Computes and updates |active_match_ordinal_| based on |active_frame_| and
   // |relative_active_match_ordinal_|.
   void UpdateActiveMatchOrdinal();
 
   // Called when all pending find replies have been received for the find
@@ skipping 140 matching lines @@
   std::queue<FindRequest> find_request_queue_;
 
   // Keeps track of the find request ID of the last find reply reported via
   // NotifyFindReply().
   int last_reported_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FIND_REQUEST_MANAGER_H_