Prefix CommandLine usage with base namespace (Part 4: ash/)

ash/shell/content_client/shell_main_delegate.cc

Index: ash/shell/content_client/shell_main_delegate.cc
diff --git a/ash/shell/content_client/shell_main_delegate.cc b/ash/shell/content_client/shell_main_delegate.cc
index 5e6144316839da507045ae734c099799c5471b60..3bb7e6392b436805631185f9f45d2429c4015709 100644
--- a/ash/shell/content_client/shell_main_delegate.cc
+++ b/ash/shell/content_client/shell_main_delegate.cc
@@ -19,7 +19,8 @@ ShellMainDelegate::~ShellMainDelegate() {
 }
 
 bool ShellMainDelegate::BasicStartupComplete(int* exit_code) {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
   std::string process_type =
       command_line.GetSwitchValueASCII(switches::kProcessType);