[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/argument_spec.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/argument_spec.h"
+#include "extensions/renderer/bindings/argument_spec.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "content/public/child/v8_value_converter.h"
-#include "extensions/renderer/api_invocation_errors.h"
-#include "extensions/renderer/api_type_reference_map.h"
+#include "extensions/renderer/bindings/api_invocation_errors.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
 #include "gin/converter.h"
 #include "gin/dictionary.h"
 
 namespace extensions {
 
 namespace {
 
 // Returns a type string for the given |value|.
 const char* GetV8ValueTypeString(v8::Local<v8::Value> value) {
   DCHECK(!value.IsEmpty());
@@ skipping 609 matching lines @@
   return true;
 }
 
 std::string ArgumentSpec::GetInvalidTypeError(
     v8::Local<v8::Value> value) const {
   return api_errors::InvalidType(GetTypeName().c_str(),
                                  GetV8ValueTypeString(value));
 }
 
 }  // namespace extensions