[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_signature_unittest.cc

Index: extensions/renderer/bindings/api_signature_unittest.cc
diff --git a/extensions/renderer/api_signature_unittest.cc b/extensions/renderer/bindings/api_signature_unittest.cc
similarity index 97%
rename from extensions/renderer/api_signature_unittest.cc
rename to extensions/renderer/bindings/api_signature_unittest.cc
index 34ac719d3d16f851f1293ef545708f021c28243d..03b152e013f8e47652f8656668e0d0c4060c92b0 100644
--- a/extensions/renderer/api_signature_unittest.cc
+++ b/extensions/renderer/bindings/api_signature_unittest.cc
@@ -2,16 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/api_signature.h"
+#include "extensions/renderer/bindings/api_signature.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
-#include "extensions/renderer/api_binding_test.h"
-#include "extensions/renderer/api_binding_test_util.h"
-#include "extensions/renderer/api_invocation_errors.h"
-#include "extensions/renderer/api_type_reference_map.h"
-#include "extensions/renderer/argument_spec.h"
-#include "extensions/renderer/argument_spec_builder.h"
+#include "extensions/renderer/bindings/api_binding_test.h"
+#include "extensions/renderer/bindings/api_binding_test_util.h"
+#include "extensions/renderer/bindings/api_invocation_errors.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
+#include "extensions/renderer/bindings/argument_spec.h"
+#include "extensions/renderer/bindings/argument_spec_builder.h"
 #include "gin/converter.h"
 
 namespace extensions {