Add FilePath to base namespace.

chrome/test/chromedriver/chrome_finder.h

Index: chrome/test/chromedriver/chrome_finder.h
diff --git a/chrome/test/chromedriver/chrome_finder.h b/chrome/test/chromedriver/chrome_finder.h
index e9df71e306cff68dc03b1c8eacb7b32af833eb96..0e7ca90fb4549a24e67e4f9f0392228674eaf7be 100644
--- a/chrome/test/chromedriver/chrome_finder.h
+++ b/chrome/test/chromedriver/chrome_finder.h
@@ -9,18 +9,20 @@
 
 #include "base/callback_forward.h"
 
+namespace base {
 class FilePath;
+}
 
 // Gets the path to the default Chrome executable. Returns true on success.
-bool FindChrome(FilePath* browser_exe);
+bool FindChrome(base::FilePath* browser_exe);
 
 namespace internal {
 
 bool FindExe(
-    const base::Callback<bool(const FilePath&)>& exists_func,
-    const std::vector<FilePath>& rel_paths,
-    const std::vector<FilePath>& locations,
-    FilePath* out_path);
+    const base::Callback<bool(const base::FilePath&)>& exists_func,
+    const std::vector<base::FilePath>& rel_paths,
+    const std::vector<base::FilePath>& locations,
+    base::FilePath* out_path);
 
 }  // namespace internal