Add FilePath to base namespace.

win8/delegate_execute/delegate_execute_util.cc

Index: win8/delegate_execute/delegate_execute_util.cc
diff --git a/win8/delegate_execute/delegate_execute_util.cc b/win8/delegate_execute/delegate_execute_util.cc
index d04c667b9c233e98083c6cba073a7cd956cfe870..70ca3e38b423d75661e3326bed91d8a5229e8f27 100644
--- a/win8/delegate_execute/delegate_execute_util.cc
+++ b/win8/delegate_execute/delegate_execute_util.cc
@@ -16,13 +16,13 @@ CommandLine CommandLineFromParameters(const wchar_t* params) {
     string16 command_string(L"noprogram.exe ");
     command_string.append(params);
     command_line.ParseFromString(command_string);
-    command_line.SetProgram(FilePath());
+    command_line.SetProgram(base::FilePath());
   }
 
   return command_line;
 }
 
-CommandLine MakeChromeCommandLine(const FilePath& chrome_exe,
+CommandLine MakeChromeCommandLine(const base::FilePath& chrome_exe,
                                   const CommandLine& params,
                                   const string16& argument) {
   CommandLine chrome_cmd(params);