Add FilePath to base namespace.

net/test/python_utils.h

Index: net/test/python_utils.h
diff --git a/net/test/python_utils.h b/net/test/python_utils.h
index c7cf289310703cd694858477daab240a3a72ad75..30776456503f7bec8d96ae48bd641f0fcd020ac3 100644
--- a/net/test/python_utils.h
+++ b/net/test/python_utils.h
@@ -8,16 +8,19 @@
 #include "base/compiler_specific.h"
 
 class CommandLine;
+
+namespace base {
 class FilePath;
+}
 
 // This is the python path variable name.
 extern const char kPythonPathEnv[];
 
 // Appends the dir to python path environment variable.
-void AppendToPythonPath(const FilePath& dir);
+void AppendToPythonPath(const base::FilePath& dir);
 
 // Return the location of the compiler-generated python protobuf.
-bool GetPyProtoPath(FilePath* dir);
+bool GetPyProtoPath(base::FilePath* dir);
 
 // Returns the command that should be used to launch Python.
 bool GetPythonCommand(CommandLine* python_cmd) WARN_UNUSED_RESULT;