Cleanup: Better constify some strings in chrome/browser/{chromeos,extensions}.

chrome/browser/extensions/active_script_controller_browsertest.cc

Index: chrome/browser/extensions/active_script_controller_browsertest.cc
diff --git a/chrome/browser/extensions/active_script_controller_browsertest.cc b/chrome/browser/extensions/active_script_controller_browsertest.cc
index d282170b04960b14d3360fbf8a4c16e95f661448..eea16bd545bd3f20fb2a0587f606228fa71e2b9c 100644
--- a/chrome/browser/extensions/active_script_controller_browsertest.cc
+++ b/chrome/browser/extensions/active_script_controller_browsertest.cc
@@ -108,7 +108,7 @@ const Extension* ActiveScriptControllerBrowserTest::CreateExtension(
               "content_script" : "execute_script",
           host_type == ALL_HOSTS ? "all_hosts" : "explicit_hosts");
 
-  const char* permission_scheme =
+  const char* const permission_scheme =
       host_type == ALL_HOSTS ? kAllHostsScheme : kExplicitHostsScheme;
 
   std::string permissions = base::StringPrintf(
@@ -303,7 +303,7 @@ IN_PROC_BROWSER_TEST_F(ActiveScriptControllerBrowserTest,
   base::FilePath active_script_path =
       test_data_dir_.AppendASCII("active_script");
 
-  const char* kExtensionNames[] = {
+  const char* const kExtensionNames[] = {
       "inject_scripts_all_hosts",
       "inject_scripts_explicit_hosts",
       "content_scripts_all_hosts",
@@ -415,7 +415,7 @@ class FlagOffActiveScriptControllerBrowserTest
 
 IN_PROC_BROWSER_TEST_F(FlagOffActiveScriptControllerBrowserTest,
                        ScriptsExecuteWhenFlagAbsent) {
-  const char* kExtensionNames[] = {
+  const char* const kExtensionNames[] = {
     "content_scripts_all_hosts",
     "inject_scripts_all_hosts",
   };