[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/api_binding_test.h

-// 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.
-
-#ifndef EXTENSIONS_RENDERER_API_BINDING_TEST_H_
-#define EXTENSIONS_RENDERER_API_BINDING_TEST_H_
-
-#include <memory>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/test/scoped_task_environment.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "v8/include/v8.h"
-
-namespace gin {
-class ContextHolder;
-class IsolateHolder;
-}
-
-namespace extensions {
-
-// A common unit test class for testing API bindings. Creates an isolate and an
-// initial v8 context, and checks for v8 leaks at the end of the test.
-class APIBindingTest : public testing::Test {
- protected:
-  APIBindingTest();
-  ~APIBindingTest() override;
-
-  // Returns the V8 ExtensionConfiguration to use for contexts. The default
-  // implementation returns null.
-  virtual v8::ExtensionConfiguration* GetV8ExtensionConfiguration();
-
-  // testing::Test:
-  void SetUp() override;
-  void TearDown() override;
-
-  // Returns a local to the main context.
-  v8::Local<v8::Context> MainContext();
-
-  // Creates a new context (maintaining it with a holder in
-  // |additional_context_holders_| and returns a local.
-  v8::Local<v8::Context> AddContext();
-
-  // Disposes the context pointed to by |context|.
-  void DisposeContext(v8::Local<v8::Context> context);
-
-  // Disposes all contexts and checks for leaks.
-  void DisposeAllContexts();
-
-  // Allows subclasses to perform context disposal cleanup.
-  virtual void OnWillDisposeContext(v8::Local<v8::Context> context) {}
-
-  // Returns the associated isolate. Defined out-of-line to avoid the include
-  // for IsolateHolder in the header.
-  v8::Isolate* isolate();
-
- private:
-  void RunGarbageCollection();
-
-  base::test::ScopedTaskEnvironment scoped_task_environment_;
-
-  std::unique_ptr<gin::IsolateHolder> isolate_holder_;
-  std::unique_ptr<gin::ContextHolder> main_context_holder_;
-  std::vector<std::unique_ptr<gin::ContextHolder>> additional_context_holders_;
-
-  DISALLOW_COPY_AND_ASSIGN(APIBindingTest);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_RENDERER_API_BINDING_TEST_H_