Delete some unused code found by -Wunused-function

chrome/browser/download/save_page_browsertest.cc

Index: chrome/browser/download/save_page_browsertest.cc
diff --git a/chrome/browser/download/save_page_browsertest.cc b/chrome/browser/download/save_page_browsertest.cc
index 6a0f33c32adb9a9d672a4a162710d1e256403cdd..574e249e5b587f45a437fd4e0cfce99ea522ed65 100644
--- a/chrome/browser/download/save_page_browsertest.cc
+++ b/chrome/browser/download/save_page_browsertest.cc
@@ -53,22 +53,15 @@ using content::DownloadManager;
 using content::DownloadPersistentStoreInfo;
 using content::WebContents;
 
-namespace {
+const FilePath::CharType kTestDir[] = FILE_PATH_LITERAL("save_page");
 
-static const FilePath::CharType* kTestDir = FILE_PATH_LITERAL("save_page");
-
-static const char* kAppendedExtension =
+const char kAppendedExtension[] =
 #if defined(OS_WIN)
     ".htm";
 #else
     ".html";
 #endif
 
-void NullFunction() {
-}
-
-}  // namespace
-
 // Loosely based on logic in DownloadTestObserver.
 class DownloadItemCreatedObserver : public DownloadManager::Observer {
  public: