Move CommandLine to base namespace.

content/public/common/sandbox_init.h

Index: content/public/common/sandbox_init.h
diff --git a/content/public/common/sandbox_init.h b/content/public/common/sandbox_init.h
index f709d23ea2ad44d420a6380143dfd486f5778d48..313662da0b016c46f03cf4983d44bd113ce466a0 100644
--- a/content/public/common/sandbox_init.h
+++ b/content/public/common/sandbox_init.h
@@ -10,9 +10,8 @@
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 
-class CommandLine;
-
 namespace base {
+class CommandLine;
 class FilePath;
 }
 
@@ -59,7 +58,7 @@ CONTENT_EXPORT bool BrokerAddTargetPeer(HANDLE peer_process);
 // then it just has to outlive this method call.
 CONTENT_EXPORT base::ProcessHandle StartSandboxedProcess(
     SandboxedProcessLauncherDelegate* delegate,
-    CommandLine* cmd_line);
+    base::CommandLine* cmd_line);
 
 #elif defined(OS_MACOSX)