Replace FilePath with base::FilePath.

chrome/test/webdriver/commands/chrome_commands.cc

Index: chrome/test/webdriver/commands/chrome_commands.cc
diff --git a/chrome/test/webdriver/commands/chrome_commands.cc b/chrome/test/webdriver/commands/chrome_commands.cc
index 87b754294fa321991ea49543bd98554e9c09961a..1b470aa4d9f4658a72c4eb5499d0b5e3804ae464 100644
--- a/chrome/test/webdriver/commands/chrome_commands.cc
+++ b/chrome/test/webdriver/commands/chrome_commands.cc
@@ -74,7 +74,7 @@ void ExtensionsCommand::ExecuteGet(Response* const response) {
 }
 
 void ExtensionsCommand::ExecutePost(Response* const response) {
-  FilePath::StringType path_string;
+  base::FilePath::StringType path_string;
   if (!GetStringParameter("path", &path_string)) {
     response->SetError(new Error(kBadRequest, "'path' missing or invalid"));
     return;
@@ -82,7 +82,7 @@ void ExtensionsCommand::ExecutePost(Response* const response) {
 
   std::string extension_id;
   Error* error = session_->InstallExtension(
-      FilePath(path_string), &extension_id);
+      base::FilePath(path_string), &extension_id);
   if (error) {
     response->SetError(error);
     return;