Abstract WebContentsObserver from Autofill shared code

components/autofill/browser/autocomplete_history_manager_unittest.cc

 // Copyright (c) 2012 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.
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/string16.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 211 matching lines @@
                void(int query_id,
                     const std::vector<base::string16>& autofill_values,
                     const std::vector<base::string16>& autofill_labels,
                     const std::vector<base::string16>& autofill_icons,
                     const std::vector<int>& autofill_unique_ids));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockAutofillExternalDelegate);
 };
 
-class AutocompleteHistoryManagerStubSend : public AutocompleteHistoryManager {
- public:
-  explicit AutocompleteHistoryManagerStubSend(WebContents* web_contents)
-      : AutocompleteHistoryManager(web_contents) {}
-
-  // Increase visibility for testing.
-  void SendSuggestions(const std::vector<base::string16>* suggestions) {
-    AutocompleteHistoryManager::SendSuggestions(suggestions);
-  }
-
-  // Intentionally swallow the message.
-  virtual bool Send(IPC::Message* message) OVERRIDE {
-    delete message;
-    return true;
-  }
-};
-
 }  // namespace
 
 // Make sure our external delegate is called at the right time.
 TEST_F(AutocompleteHistoryManagerTest, ExternalDelegate) {
-  // Local version with a stubbed out Send()
-  AutocompleteHistoryManagerStubSend autocomplete_history_manager(
-      web_contents());
+  AutocompleteHistoryManager autocomplete_history_manager(web_contents());
+  autocomplete_history_manager.send_IPC_ = false;
 
   AutofillManager::CreateForWebContentsAndDelegate(
       web_contents(),
       &manager_delegate,
       "en-US",
       AutofillManager::ENABLE_AUTOFILL_DOWNLOAD_MANAGER);
 
   MockAutofillExternalDelegate external_delegate(web_contents());
   autocomplete_history_manager.SetExternalDelegate(&external_delegate);
 
   // Should trigger a call to OnSuggestionsReturned, verified by the mock.
   EXPECT_CALL(external_delegate, OnSuggestionsReturned(_, _, _, _, _));
   autocomplete_history_manager.SendSuggestions(NULL);
 }
 
 }  // namespace autofill