Add FilePath to base namespace.

win8/delegate_execute/delegate_execute_operation.h

Index: win8/delegate_execute/delegate_execute_operation.h
diff --git a/win8/delegate_execute/delegate_execute_operation.h b/win8/delegate_execute/delegate_execute_operation.h
index 3fc1b00a8b6fba139ea8a2a5c512cc551693025c..8d2900d27074dde07e3b33ed84386e8fd7abdd32 100644
--- a/win8/delegate_execute/delegate_execute_operation.h
+++ b/win8/delegate_execute/delegate_execute_operation.h
@@ -60,14 +60,14 @@ class DelegateExecuteOperation {
   // Returns the process id of the parent or 0 on failure.
   DWORD GetParentPid() const;
 
-  const FilePath& shortcut() const {
+  const base::FilePath& shortcut() const {
     return relaunch_shortcut_;
   }
 
  private:
   OperationType operation_type_;
   string16 relaunch_flags_;
-  FilePath relaunch_shortcut_;
+  base::FilePath relaunch_shortcut_;
   string16 mutex_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegateExecuteOperation);