Fix invalid cast to BrowsingDataRemoverImpl

chrome/browser/browsing_data/mock_browsing_data_remover.h

Index: chrome/browser/browsing_data/mock_browsing_data_remover.h
diff --git a/chrome/browser/browsing_data/mock_browsing_data_remover.h b/chrome/browser/browsing_data/mock_browsing_data_remover.h
index e220a082d585073b8809b4af4bdbd69d01ec0f5e..fa1f8bfa410e04c20749a8fa483e65f9310389a2 100644
--- a/chrome/browser/browsing_data/mock_browsing_data_remover.h
+++ b/chrome/browser/browsing_data/mock_browsing_data_remover.h
@@ -8,7 +8,6 @@
 #include <list>
 
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
-#include "components/keyed_service/core/keyed_service.h"
 
 namespace content {
 class BrowserContext;
@@ -17,8 +16,7 @@ class BrowserContext;
 // A BrowsingDataRemover that only records Remove*() calls.
 // Some of the other methods are NOTIMPLEMENTED() as they are not needed for
 // existing testcases.
-class MockBrowsingDataRemover : public BrowsingDataRemover,
-                                public KeyedService {
+class MockBrowsingDataRemover : public BrowsingDataRemover {
  public:
   explicit MockBrowsingDataRemover(content::BrowserContext* context);