Move file_path.h to base/files.

TBR=sky

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184344 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/external_provider_impl.cc b/chrome/browser/extensions/external_provider_impl.cc
index d067778..0cd1971a 100644
--- a/chrome/browser/extensions/external_provider_impl.cc
+++ b/chrome/browser/extensions/external_provider_impl.cc
@@ -5,7 +5,7 @@
 #include "chrome/browser/extensions/external_provider_impl.h"
 
 #include "base/command_line.h"
-#include "base/file_path.h"
+#include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "base/metrics/field_trial.h"