Make callers of CommandLine use it via the base:: namespace.

chrome/browser/extensions/all_urls_apitest.cc

Index: chrome/browser/extensions/all_urls_apitest.cc
diff --git a/chrome/browser/extensions/all_urls_apitest.cc b/chrome/browser/extensions/all_urls_apitest.cc
index b251d72ee748f55dc2ed03b525b3a14e9d131ec8..c29611c7eea53407ca0f5fe45c94dd7a0477d3e9 100644
--- a/chrome/browser/extensions/all_urls_apitest.cc
+++ b/chrome/browser/extensions/all_urls_apitest.cc
@@ -28,7 +28,8 @@ typedef ExtensionApiTest AllUrlsApiTest;
 IN_PROC_BROWSER_TEST_F(AllUrlsApiTest, MAYBE_WhitelistedExtension) {
 #if defined(OS_WIN) && defined(USE_ASH)
   // Disable this test in Metro+Ash for now (http://crbug.com/262796).
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAshBrowserTests))
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAshBrowserTests))
     return;
 #endif