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

chrome/browser/jumplist_win.cc

Index: chrome/browser/jumplist_win.cc
diff --git a/chrome/browser/jumplist_win.cc b/chrome/browser/jumplist_win.cc
index 1eb72f594f41574bbd54ba47ee04b41fa57b670f..eeb5f8a5f84c723b12b2461c5a775aaab7e59dbd 100644
--- a/chrome/browser/jumplist_win.cc
+++ b/chrome/browser/jumplist_win.cc
@@ -52,7 +52,8 @@ namespace {
 // Append the common switches to each shell link.
 void AppendCommonSwitches(ShellLinkItem* shell_link) {
   const char* kSwitchNames[] = { switches::kUserDataDir };
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
   shell_link->GetCommandLine()->CopySwitchesFrom(command_line,
                                                  kSwitchNames,
                                                  arraysize(kSwitchNames));