Abstract WebContentsObserver from Autofill shared code

components/autofill/browser/autocomplete_history_manager_unittest.cc

Index: components/autofill/browser/autocomplete_history_manager_unittest.cc
diff --git a/components/autofill/browser/autocomplete_history_manager_unittest.cc b/components/autofill/browser/autocomplete_history_manager_unittest.cc
index b8b144eae002a3c69de875cf38a06222240db39f..c93ea2d1fbc12076787733ad7b2d35e2812dd7f4 100644
--- a/components/autofill/browser/autocomplete_history_manager_unittest.cc
+++ b/components/autofill/browser/autocomplete_history_manager_unittest.cc
@@ -229,30 +229,12 @@ class MockAutofillExternalDelegate : public AutofillExternalDelegate {
   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(),