Add FilePath to base namespace.

win8/metro_driver/file_picker_ash.h

Index: win8/metro_driver/file_picker_ash.h
diff --git a/win8/metro_driver/file_picker_ash.h b/win8/metro_driver/file_picker_ash.h
index ec8cf6ae12e997603048386518ebef6c97d16a25..4426f5cc7431a8d079c8a4e4c4e1a5027f4b0878 100644
--- a/win8/metro_driver/file_picker_ash.h
+++ b/win8/metro_driver/file_picker_ash.h
@@ -10,10 +10,13 @@
 #include "base/compiler_specific.h"
 #include "base/string16.h"
 
-class FilePath;
 class ChromeAppViewAsh;
 struct MetroViewerHostMsg_SaveAsDialogParams;
 
+namespace base {
+class FilePath;
+}
+
 // Base class for the file pickers.
 class FilePickerSessionBase {
  public:
@@ -79,7 +82,7 @@ class OpenFilePickerSession : public FilePickerSessionBase {
                                  const string16& default_path,
                                  bool allow_multi_select);
 
-  const std::vector<FilePath>& filenames() const {
+  const std::vector<base::FilePath>& filenames() const {
     return filenames_;
   }
 
@@ -113,7 +116,7 @@ class OpenFilePickerSession : public FilePickerSessionBase {
   bool allow_multi_select_;
   // If multi select is true then this member contains the list of filenames
   // to be returned back.
-  std::vector<FilePath> filenames_;
+  std::vector<base::FilePath> filenames_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenFilePickerSession);
 };