Move TestSafeBrowsingService* to anonymous namespace

chrome/browser/download/download_browsertest.cc

Index: chrome/browser/download/download_browsertest.cc
diff --git a/chrome/browser/download/download_browsertest.cc b/chrome/browser/download/download_browsertest.cc
index 08f6357eea0ee7901eb9e156896ffd00f06d50f4..5a17a04f7b76fc35d3525a14f26b5e3e5ce4472e 100644
--- a/chrome/browser/download/download_browsertest.cc
+++ b/chrome/browser/download/download_browsertest.cc
@@ -1096,6 +1096,8 @@ class DownloadTest : public InProcessBrowserTest {
   scoped_ptr<DownloadTestFileActivityObserver> file_activity_observer_;
 };
 
+namespace {
+
 class FakeDownloadProtectionService
     : public safe_browsing::DownloadProtectionService {
  public:
@@ -1171,6 +1173,8 @@ class DownloadTestWithFakeSafeBrowsing : public DownloadTest {
   scoped_ptr<TestSafeBrowsingServiceFactory> test_safe_browsing_factory_;
 };
 
+}  // namespace
+
 // NOTES:
 //
 // Files for these tests are found in DIR_TEST_DATA (currently