Cleanup: Better constify some strings in chrome.

chrome/test/chromedriver/util_unittest.cc

Index: chrome/test/chromedriver/util_unittest.cc
diff --git a/chrome/test/chromedriver/util_unittest.cc b/chrome/test/chromedriver/util_unittest.cc
index 8ccb8d3c8cce5728c0d631f5fe5ee8383a79e688..d68dd36a6bcebad9d900f875641eb483583812b3 100644
--- a/chrome/test/chromedriver/util_unittest.cc
+++ b/chrome/test/chromedriver/util_unittest.cc
@@ -18,7 +18,7 @@ TEST(UnzipSoleFile, Entry) {
   std::string data;
   // A zip entry sent from a Java WebDriver client (v2.20) that contains a
   // file with the contents "COW\n".
-  const char* kBase64ZipEntry =
+  const char kBase64ZipEntry[] =
       "UEsDBBQACAAIAJpyXEAAAAAAAAAAAAAAAAAEAAAAdGVzdHP2D+"
       "cCAFBLBwi/wAzGBgAAAAQAAAA=";
   ASSERT_TRUE(base::Base64Decode(kBase64ZipEntry, &data));
@@ -36,7 +36,7 @@ TEST(UnzipSoleFile, Archive) {
   std::string data;
   // A zip archive sent from a Python WebDriver client that contains a
   // file with the contents "COW\n".
-  const char* kBase64ZipArchive =
+  const char kBase64ZipArchive[] =
       "UEsDBBQAAAAAAMROi0K/wAzGBAAAAAQAAAADAAAAbW9vQ09XClBLAQIUAxQAAAAAAMROi0K/"
       "wAzGBAAAAAQAAAADAAAAAAAAAAAAAACggQAAAABtb29QSwUGAAAAAAEAAQAxAAAAJQAAAAA"
       "A";