[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/api_binding_test.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_test.h"
-
-#include "base/memory/ptr_util.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "gin/array_buffer.h"
-#include "gin/public/context_holder.h"
-#include "gin/public/isolate_holder.h"
-#include "gin/v8_initializer.h"
-
-namespace extensions {
-
-APIBindingTest::APIBindingTest() {}
-APIBindingTest::~APIBindingTest() {}
-
-v8::ExtensionConfiguration* APIBindingTest::GetV8ExtensionConfiguration() {
-  return nullptr;
-}
-
-void APIBindingTest::SetUp() {
-  // Much of this initialization is stolen from the somewhat-similar
-  // gin::V8Test.
-#ifdef V8_USE_EXTERNAL_STARTUP_DATA
-  gin::V8Initializer::LoadV8Snapshot();
-  gin::V8Initializer::LoadV8Natives();
-#endif
-
-  gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::IsolateHolder::kStableV8Extras,
-                                 gin::ArrayBufferAllocator::SharedInstance());
-
-  isolate_holder_ =
-      base::MakeUnique<gin::IsolateHolder>(base::ThreadTaskRunnerHandle::Get());
-  isolate()->Enter();
-
-  v8::HandleScope handle_scope(isolate());
-  v8::Local<v8::Context> context =
-      v8::Context::New(isolate(), GetV8ExtensionConfiguration());
-  context->Enter();
-  main_context_holder_ = base::MakeUnique<gin::ContextHolder>(isolate());
-  main_context_holder_->SetContext(context);
-}
-
-void APIBindingTest::TearDown() {
-  if (main_context_holder_ || !additional_context_holders_.empty()) {
-    DisposeAllContexts();
-  } else {
-    // The context was already deleted (as through DisposeContext()), but we
-    // still need to garbage collect.
-    RunGarbageCollection();
-  }
-
-  isolate()->Exit();
-  isolate_holder_.reset();
-}
-
-void APIBindingTest::DisposeAllContexts() {
-  auto dispose_and_check_context =
-      [this](std::unique_ptr<gin::ContextHolder>& holder, bool exit) {
-        // Check for leaks - a weak handle to a context is invalidated on
-        // context destruction, so resetting the context should reset the
-        // handle.
-        v8::Global<v8::Context> weak_context;
-        {
-          v8::HandleScope handle_scope(isolate());
-          v8::Local<v8::Context> context = holder->context();
-          weak_context.Reset(isolate(), context);
-          weak_context.SetWeak();
-          OnWillDisposeContext(context);
-          if (exit)
-            context->Exit();
-        }
-        holder.reset();
-
-        // Garbage collect everything so that we find any issues where we might
-        // be double-freeing.
-        RunGarbageCollection();
-
-        // The context should have been deleted.
-        // (ASSERT_TRUE is not used, so that Isolate::Exit is still called.)
-        EXPECT_TRUE(weak_context.IsEmpty());
-      };
-
-  for (auto& context_holder : additional_context_holders_)
-    dispose_and_check_context(context_holder, false);
-  additional_context_holders_.clear();
-
-  if (main_context_holder_)
-    dispose_and_check_context(main_context_holder_, true);
-}
-
-v8::Local<v8::Context> APIBindingTest::AddContext() {
-  auto holder = base::MakeUnique<gin::ContextHolder>(isolate());
-  v8::Local<v8::Context> context =
-      v8::Context::New(isolate(), GetV8ExtensionConfiguration());
-  holder->SetContext(context);
-  additional_context_holders_.push_back(std::move(holder));
-  return context;
-}
-
-v8::Local<v8::Context> APIBindingTest::MainContext() {
-  return main_context_holder_->context();
-}
-
-void APIBindingTest::DisposeContext(v8::Local<v8::Context> context) {
-  if (main_context_holder_ && context == main_context_holder_->context()) {
-    OnWillDisposeContext(context);
-    main_context_holder_.reset();
-    return;
-  }
-
-  auto iter = std::find_if(
-      additional_context_holders_.begin(), additional_context_holders_.end(),
-      [context](const std::unique_ptr<gin::ContextHolder>& holder) {
-        return holder->context() == context;
-      });
-  ASSERT_TRUE(iter != additional_context_holders_.end())
-      << "Could not find context";
-  OnWillDisposeContext(context);
-  additional_context_holders_.erase(iter);
-}
-
-v8::Isolate* APIBindingTest::isolate() {
-  return isolate_holder_->isolate();
-}
-
-void APIBindingTest::RunGarbageCollection() {
-  // '5' is a magic number stolen from Blink; arbitrarily large enough to
-  // hopefully clean up all the various paths.
-  for (int i = 0; i < 5; ++i) {
-    isolate()->RequestGarbageCollectionForTesting(
-        v8::Isolate::kFullGarbageCollection);
-  }
-}
-
-}  // namespace extensions