Introduce ScopedCommandLine

chrome/browser/chromeos/events/event_rewriter_unittest.cc

Index: chrome/browser/chromeos/events/event_rewriter_unittest.cc
diff --git a/chrome/browser/chromeos/events/event_rewriter_unittest.cc b/chrome/browser/chromeos/events/event_rewriter_unittest.cc
index dbab19f63042a9c67031e4c38e12c766a7df4d92..6cfd5303952e9478747e9c43fd91e9b4dfedc4a4 100644
--- a/chrome/browser/chromeos/events/event_rewriter_unittest.cc
+++ b/chrome/browser/chromeos/events/event_rewriter_unittest.cc
@@ -489,12 +489,9 @@ TEST_F(EventRewriterTest, TestRewriteNumPadKeys) {
 
 TEST_F(EventRewriterTest, TestRewriteNumPadKeysWithDiamondKeyFlag) {
   // Make sure the num lock works correctly even when Diamond key exists.
-  const base::CommandLine original_cl(*base::CommandLine::ForCurrentProcess());
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       chromeos::switches::kHasChromeOSDiamondKey, "");
-
   TestRewriteNumPadKeys();
-  *base::CommandLine::ForCurrentProcess() = original_cl;
 }
 
 // Tests if the rewriter can handle a Command + Num Pad event.