Add missing files from commit b426e3edde04.

testing/js_embedder_test.cpp

+// Copyright 2015 PDFium 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 "testing/js_embedder_test.h"
+
+JSEmbedderTest::JSEmbedderTest()
+    : m_pArrayBufferAllocator(new FXJS_ArrayBufferAllocator) {
+  v8::Isolate::CreateParams params;
+  params.array_buffer_allocator = m_pArrayBufferAllocator.get();
+  m_pIsolate = v8::Isolate::New(params);
+}
+
+JSEmbedderTest::~JSEmbedderTest() {
+  m_pIsolate->Dispose();
+}
+
+void JSEmbedderTest::SetUp() {
+  EmbedderTest::SetExternalIsolate(m_pIsolate);
+  EmbedderTest::SetUp();
+
+  v8::Isolate::Scope isolate_scope(m_pIsolate);
+  v8::HandleScope handle_scope(m_pIsolate);
+  FXJS_PerIsolateData::SetUp(m_pIsolate);
+  FXJS_InitializeRuntime(m_pIsolate, nullptr, &m_pPersistentContext,
+                         &m_StaticObjects);
+}
+
+void JSEmbedderTest::TearDown() {
+  FXJS_ReleaseRuntime(m_pIsolate, &m_pPersistentContext, &m_StaticObjects);
+  m_pPersistentContext.Reset();
+  FXJS_Release();
+  EmbedderTest::TearDown();
+}
+
+v8::Isolate* JSEmbedderTest::isolate() {
+  return m_pIsolate;
+}
+
+v8::Local<v8::Context> JSEmbedderTest::GetV8Context() {
+  return m_pPersistentContext.Get(m_pIsolate);
+}