Cleanup: Better constify some strings in chrome.

chrome/app/chrome_main_delegate.cc

Index: chrome/app/chrome_main_delegate.cc
diff --git a/chrome/app/chrome_main_delegate.cc b/chrome/app/chrome_main_delegate.cc
index 2d277a6ecf4a095a7fe3be2d7549ba278fa5ff02..118ac5d1f74bd9772469d4b2a1ef67ad2c72b034 100644
--- a/chrome/app/chrome_main_delegate.cc
+++ b/chrome/app/chrome_main_delegate.cc
@@ -487,13 +487,12 @@ bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
   // original command line.
   if (command_line.HasSwitch(chromeos::switches::kLoginUser) ||
       command_line.HasSwitch(switches::kDiagnosticsRecovery)) {
-
     // The statistics subsystem needs get initialized soon enough for the
     // statistics to be collected.  It's safe to call this more than once.
     base::StatisticsRecorder::Initialize();
 
     CommandLine interim_command_line(command_line.GetProgram());
-    const char* kSwitchNames[] = {switches::kUserDataDir, };
+    const char* const kSwitchNames[] = {switches::kUserDataDir, };
     interim_command_line.CopySwitchesFrom(
         command_line, kSwitchNames, arraysize(kSwitchNames));
     interim_command_line.AppendSwitch(switches::kDiagnostics);