Fix DCHECK during Find (issue #2050)

libcef/browser/browser_host_impl.cc

@@ -784,6 +784,14 @@ void CefBrowserHostImpl::Find(int identifier, const CefString& searchText,
     if (!web_contents_)
       return;
 
+    // Every find request must have a unique ID and these IDs must strictly
+    // increase so that newer requests always have greater IDs than older
+    // requests.
+    if (identifier <= find_request_id_counter_)
+      identifier = ++find_request_id_counter_;
+    else
+      find_request_id_counter_ = identifier;
+
     blink::WebFindOptions options;
     options.forward = forward;
     options.match_case = matchCase;

libcef/browser/browser_host_impl.h

@@ -637,6 +637,9 @@ class CefBrowserHostImpl : public CefBrowserHost,
   // Observers that want to be notified of changes to this object.
   base::ObserverList<Observer> observers_;
 
+  // Used to provide unique incremental IDs for each find request.
+  int find_request_id_counter_ = 0;
+
   IMPLEMENT_REFCOUNTING(CefBrowserHostImpl);
   DISALLOW_COPY_AND_ASSIGN(CefBrowserHostImpl);
 };