Add FilePath to base namespace.

webkit/media/crypto/ppapi/clear_key_cdm.cc

Index: webkit/media/crypto/ppapi/clear_key_cdm.cc
diff --git a/webkit/media/crypto/ppapi/clear_key_cdm.cc b/webkit/media/crypto/ppapi/clear_key_cdm.cc
index 7c6eda5fd68f01ea5a0eaa130515b2a5b09c4e8f..2894a52dcb1d3cf95805052134afec247d5455e1 100644
--- a/webkit/media/crypto/ppapi/clear_key_cdm.cc
+++ b/webkit/media/crypto/ppapi/clear_key_cdm.cc
@@ -50,7 +50,7 @@ static base::AtExitManager g_at_exit_manager;
 // are required for running in the sandbox, and should no longer be required
 // after http://crbug.com/91970 is fixed.
 static bool InitializeFFmpegLibraries() {
-  FilePath file_path;
+  base::FilePath file_path;
   CHECK(PathService::Get(base::DIR_EXE, &file_path));
   CHECK(media::InitializeMediaLibrary(file_path));
   return true;