[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_bindings_system_unittest.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_bindings_system.h"
+#include "extensions/renderer/bindings/api_bindings_system.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "extensions/common/event_filtering_info.h"
-#include "extensions/common/extension_api.h"
-#include "extensions/renderer/api_binding.h"
-#include "extensions/renderer/api_binding_hooks.h"
-#include "extensions/renderer/api_binding_hooks_test_delegate.h"
-#include "extensions/renderer/api_binding_test_util.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/api_bindings_system_unittest.h"
-#include "extensions/renderer/api_invocation_errors.h"
+#include "extensions/renderer/bindings/api_binding.h"
+#include "extensions/renderer/bindings/api_binding_hooks.h"
+#include "extensions/renderer/bindings/api_binding_hooks_test_delegate.h"
+#include "extensions/renderer/bindings/api_binding_test_util.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/api_bindings_system_unittest.h"
+#include "extensions/renderer/bindings/api_invocation_errors.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
 #include "gin/try_catch.h"
 
 namespace extensions {
 
 namespace {
 
 // Fake API for testing.
 const char kAlphaAPIName[] = "alpha";
@@ skipping 438 matching lines @@
   v8::Local<v8::Value> other_event =
       GetPropertyFromObject(api, context, "alphaOtherEvent");
   ASSERT_TRUE(other_event->IsObject());
   EXPECT_EQ("\"alpha.alphaOtherEvent\"",
             GetStringPropertyFromObject(other_event.As<v8::Object>(), context,
                                         "name"));
   EXPECT_NE(event, other_event);
 }
 
 }  // namespace extensions