diff --git a/tools/gn/trace.cc b/tools/gn/trace.cc
index 4746310..5844293 100644
--- a/tools/gn/trace.cc
+++ b/tools/gn/trace.cc
@@ -9,6 +9,8 @@
 #include <sstream>
 #include <vector>
 
+#include "base/command_line.h"
+#include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/string_escape.h"
 #include "base/logging.h"
diff --git a/tools/gn/trace.h b/tools/gn/trace.h
index e32f319..de8ab09 100644
--- a/tools/gn/trace.h
+++ b/tools/gn/trace.h
@@ -7,14 +7,17 @@
 
 #include <string>
 
-#include "base/command_line.h"
-#include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 
 class Label;
 
+namespace base {
+class CommandLine;
+class FilePath;
+}
+
 class TraceItem {
  public:
   enum Type {