[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_binding.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/api_binding.h"
+#include "extensions/renderer/bindings/api_binding.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
-#include "extensions/common/extension_api.h"
-#include "extensions/renderer/api_binding_hooks.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/api_event_handler.h"
-#include "extensions/renderer/api_invocation_errors.h"
-#include "extensions/renderer/api_request_handler.h"
-#include "extensions/renderer/api_signature.h"
-#include "extensions/renderer/api_type_reference_map.h"
-#include "extensions/renderer/declarative_event.h"
-#include "extensions/renderer/v8_helpers.h"
+#include "extensions/renderer/bindings/api_binding_hooks.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/api_event_handler.h"
+#include "extensions/renderer/bindings/api_invocation_errors.h"
+#include "extensions/renderer/bindings/api_request_handler.h"
+#include "extensions/renderer/bindings/api_signature.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
+#include "extensions/renderer/bindings/declarative_event.h"
 #include "gin/arguments.h"
 #include "gin/handle.h"
 #include "gin/per_context_data.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 
 namespace extensions {
 
 namespace {
 
 // Returns the name of the enum value for use in JavaScript; JS enum entries use
@@ skipping 591 matching lines @@
     arguments->ThrowTypeError(api_errors::InvocationError(
         name, signature->GetExpectedSignature(), error));
     return;
   }
 
   request_handler_->StartRequest(context, name, std::move(converted_arguments),
                                  callback, custom_callback, thread);
 }
 
 }  // namespace extensions