Implement the basic testing infrastructure for FindRequestManager.

content/test/test_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_TEST_TEST_FIND_REQUEST_MANAGER_H_
+#define CONTENT_TEST_TEST_FIND_REQUEST_MANAGER_H_
+
+#include "base/gtest_prod_util.h"
+#include "content/browser/find_request_manager.h"
+#include "content/public/test/test_utils.h"
+
+namespace content {
+
+class WebContentsImpl;
+
+// TestFindRequestManager provides extra control and observation over
+// FindRequestManager for the purposes of testing, without altering its
+// behavior.
+class TestFindRequestManager : public FindRequestManager {

[nasko, 2016/04/15 19:26:50]

Do we really need to subclass the FindRequestManager? It seems that it should be
possible to use a class that implements WebContentsDelegate::FindReply. This is
used in a couple of browser test files, so it might work.

[paulmeyer, 2016/04/18 19:11:22]

Now using WebContentsDelegate instead.

+ public:
+  explicit TestFindRequestManager(WebContentsImpl* web_contents);
+  ~TestFindRequestManager() override;
+
+  // FindRequestManager overrides for testing.
+  void Find(int request_id,
+            const base::string16& search_text,
+            const blink::WebFindOptions& options) override;
+
+  // Waits for the final reply to any pending find requests.
+  void WaitForFinalReply();
+
+  // The results of a find request.
+  struct FindResults {
+    int request_id;
+    int number_of_matches;
+    int active_match_ordinal;
+  };
+
+  // Returns the current find results.
+  FindResults GetFindResults();
+
+ private:
+  // FindRequestManager overrides for testing.
+  void NotifyFindReply(int request_id, bool final_update) const override;
+
+  // The ID of the last find request requested.
+  int last_request_id_;
+
+  // The ID of the last find request to finish (all replies received).
+  mutable int last_finished_request_id_;
+
+  // If waiting using |find_message_loop_runner_|, this is the ID of the find
+  // request being waited for.
+  int waiting_request_id_;
+
+  scoped_refptr<content::MessageLoopRunner> find_message_loop_runner_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_TEST_TEST_FIND_REQUEST_MANAGER_H_