Revert of compositor-worker: Share a thread and an isolate for compositor workers.

Source/modules/compositorworker/CompositorWorkerManagerTest.cpp

Index: Source/modules/compositorworker/CompositorWorkerManagerTest.cpp
diff --git a/Source/modules/compositorworker/CompositorWorkerManagerTest.cpp b/Source/modules/compositorworker/CompositorWorkerManagerTest.cpp
deleted file mode 100644
index c9ef37917748350cb3609f122f2e58a42a477908..0000000000000000000000000000000000000000
--- a/Source/modules/compositorworker/CompositorWorkerManagerTest.cpp
+++ /dev/null
@@ -1,231 +0,0 @@
-// Copyright 2015 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 "config.h"
-#include "modules/compositorworker/CompositorWorkerManager.h"
-
-#include "bindings/core/v8/ScriptSourceCode.h"
-#include "core/testing/DummyPageHolder.h"
-#include "core/workers/WorkerLoaderProxy.h"
-#include "core/workers/WorkerObjectProxy.h"
-#include "core/workers/WorkerReportingProxy.h"
-#include "core/workers/WorkerThreadStartupData.h"
-#include "modules/compositorworker/CompositorWorkerThread.h"
-#include "platform/NotImplemented.h"
-#include "platform/ThreadSafeFunctional.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebWaitableEvent.h"
-#include <gtest/gtest.h>
-
-namespace blink {
-namespace {
-
-class TestCompositorWorkerThread : public CompositorWorkerThread {
-public:
-    TestCompositorWorkerThread(WorkerLoaderProxyProvider* loaderProxyProvider, WorkerObjectProxy& objectProxy, double timeOrigin, WebWaitableEvent* startEvent)
-        : CompositorWorkerThread(WorkerLoaderProxy::create(loaderProxyProvider), objectProxy, timeOrigin)
-        , m_startEvent(startEvent)
-    {
-    }
-
-    ~TestCompositorWorkerThread() override { }
-
-    void setCallbackAfterV8Termination(PassOwnPtr<Function<void()>> callback)
-    {
-        m_v8TerminationCallback = callback;
-    }
-
-private:
-    // WorkerThread:
-    void didStartRunLoop() override
-    {
-        m_startEvent->signal();
-    }
-    void terminateV8Execution() override
-    {
-        CompositorWorkerThread::terminateV8Execution();
-        if (m_v8TerminationCallback)
-            (*m_v8TerminationCallback)();
-    }
-
-    WebWaitableEvent* m_startEvent;
-    OwnPtr<Function<void()>> m_v8TerminationCallback;
-};
-
-} // namespace
-
-class CompositorWorkerManagerTest : public testing::Test {
-public:
-    void SetUp() override
-    {
-        m_page = DummyPageHolder::create();
-        m_objectProxy = WorkerObjectProxy::create(&m_page->document(), nullptr);
-        m_securityOrigin = SecurityOrigin::create(KURL(ParsedURLString, "http://fake.url/"));
-    }
-
-    void TearDown() override
-    {
-        ASSERT(!managerHasThread());
-        ASSERT(!managerHasIsolate());
-        m_page.clear();
-    }
-
-    PassRefPtr<TestCompositorWorkerThread> createCompositorWorker(WebWaitableEvent* startEvent)
-    {
-        TestCompositorWorkerThread* workerThread = new TestCompositorWorkerThread(nullptr, *m_objectProxy, 0, startEvent);
-        workerThread->start(WorkerThreadStartupData::create(
-            KURL(ParsedURLString, "http://fake.url/"),
-            "fake user agent",
-            "//fake source code",
-            nullptr,
-            DontPauseWorkerGlobalScopeOnStart,
-            adoptPtr(new Vector<CSPHeaderAndType>()),
-            m_securityOrigin.get(),
-            WorkerClients::create(),
-            V8CacheOptionsDefault));
-        return adoptRef(workerThread);
-    }
-
-    void createWorkerAdapter(RefPtr<CompositorWorkerThread>* workerThread, WebWaitableEvent* creationEvent)
-    {
-        *workerThread = createCompositorWorker(creationEvent);
-    }
-
-    // Attempts to run some simple script for |worker|.
-    void checkWorkerCanExecuteScript(WorkerThread* worker)
-    {
-        OwnPtr<WebWaitableEvent> waitEvent = adoptPtr(Platform::current()->createWaitableEvent());
-        worker->backingThread().platformThread().postTask(FROM_HERE, threadSafeBind(&CompositorWorkerManagerTest::executeScriptInWorker, AllowCrossThreadAccess(this),
-            AllowCrossThreadAccess(worker), AllowCrossThreadAccess(waitEvent.get())));
-        waitEvent->wait();
-    }
-
-    bool managerHasThread() const
-    {
-        return CompositorWorkerManager::instance()->m_thread;
-    }
-
-    bool managerHasIsolate() const
-    {
-        return CompositorWorkerManager::instance()->m_isolate;
-    }
-
-private:
-    void executeScriptInWorker(WorkerThread* worker, WebWaitableEvent* waitEvent)
-    {
-        WorkerScriptController* scriptController = worker->workerGlobalScope()->script();
-        ASSERT(scriptController->evaluate(ScriptSourceCode("var counter = 0; ++counter;")));
-        waitEvent->signal();
-    }
-
-    OwnPtr<DummyPageHolder> m_page;
-    RefPtr<SecurityOrigin> m_securityOrigin;
-    OwnPtr<WorkerObjectProxy> m_objectProxy;
-};
-
-TEST_F(CompositorWorkerManagerTest, Basic)
-{
-    OwnPtr<WebWaitableEvent> creationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<CompositorWorkerThread> compositorWorker = createCompositorWorker(creationEvent.get());
-    creationEvent->wait();
-    checkWorkerCanExecuteScript(compositorWorker.get());
-    compositorWorker->terminateAndWait();
-}
-
-// Tests that the same WebThread is used for new workers if the WebThread is still alive.
-TEST_F(CompositorWorkerManagerTest, CreateSecondAndTerminateFirst)
-{
-    // Create the first worker and wait until it is initialized.
-    OwnPtr<WebWaitableEvent> firstCreationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<CompositorWorkerThread> firstWorker = createCompositorWorker(firstCreationEvent.get());
-    WebThreadSupportingGC* firstThread = &CompositorWorkerManager::instance()->compositorWorkerThread();
-    ASSERT(firstThread);
-    firstCreationEvent->wait();
-    v8::Isolate* firstIsolate = firstWorker->isolate();
-    ASSERT(firstIsolate);
-
-    // Create the second worker and immediately destroy the first worker.
-    OwnPtr<WebWaitableEvent> secondCreationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<CompositorWorkerThread> secondWorker = createCompositorWorker(secondCreationEvent.get());
-    firstWorker->terminateAndWait();
-
-    // Wait until the second worker is initialized. Verify that the second worker is using the same
-    // thread and Isolate as the first worker.
-    WebThreadSupportingGC* secondThread = &CompositorWorkerManager::instance()->compositorWorkerThread();
-    ASSERT(secondThread);
-    secondCreationEvent->wait();
-    EXPECT_EQ(firstThread, secondThread);
-
-    v8::Isolate* secondIsolate = secondWorker->isolate();
-    ASSERT(secondIsolate);
-    EXPECT_EQ(firstIsolate, secondIsolate);
-
-    // Verify that the worker can still successfully execute script.
-    checkWorkerCanExecuteScript(secondWorker.get());
-
-    secondWorker->terminateAndWait();
-}
-
-static void checkCurrentIsolate(v8::Isolate* isolate, WebWaitableEvent* event)
-{
-    EXPECT_EQ(v8::Isolate::GetCurrent(), isolate);
-    event->signal();
-}
-
-// Tests that a new WebThread is created if all existing workers are terminated before a new worker is created.
-TEST_F(CompositorWorkerManagerTest, TerminateFirstAndCreateSecond)
-{
-    // Create the first worker, wait until it is initialized, and terminate it.
-    OwnPtr<WebWaitableEvent> creationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<CompositorWorkerThread> compositorWorker = createCompositorWorker(creationEvent.get());
-    WebThreadSupportingGC* firstThread = &CompositorWorkerManager::instance()->compositorWorkerThread();
-    creationEvent->wait();
-    ASSERT(compositorWorker->isolate());
-    compositorWorker->terminateAndWait();
-
-    // Create the second worker. Verify that the second worker lives in a different WebThread since the first
-    // thread will have been destroyed after destroying the first worker.
-    creationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    compositorWorker = createCompositorWorker(creationEvent.get());
-    WebThreadSupportingGC* secondThread = &CompositorWorkerManager::instance()->compositorWorkerThread();
-    EXPECT_NE(firstThread, secondThread);
-    creationEvent->wait();
-
-    // Jump over to the worker's thread to verify that the Isolate is set up correctly and execute script.
-    OwnPtr<WebWaitableEvent> checkEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    secondThread->platformThread().postTask(FROM_HERE, threadSafeBind(&checkCurrentIsolate, AllowCrossThreadAccess(compositorWorker->isolate()), AllowCrossThreadAccess(checkEvent.get())));
-    checkEvent->wait();
-    checkWorkerCanExecuteScript(compositorWorker.get());
-
-    compositorWorker->terminateAndWait();
-}
-
-// Tests that v8::Isolate and WebThread are correctly set-up if a worker is created while another is terminating.
-TEST_F(CompositorWorkerManagerTest, CreatingSecondDuringTerminationOfFirst)
-{
-    OwnPtr<WebWaitableEvent> firstCreationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<TestCompositorWorkerThread> firstWorker = createCompositorWorker(firstCreationEvent.get());
-    firstCreationEvent->wait();
-    v8::Isolate* firstIsolate = firstWorker->isolate();
-    ASSERT(firstIsolate);
-
-    // Request termination of the first worker, and set-up to make sure the second worker is created right as
-    // the first worker terminates its isolate.
-    OwnPtr<WebWaitableEvent> secondCreationEvent = adoptPtr(Platform::current()->createWaitableEvent());
-    RefPtr<CompositorWorkerThread> secondWorker;
-    firstWorker->setCallbackAfterV8Termination(bind(&CompositorWorkerManagerTest::createWorkerAdapter, this, &secondWorker, secondCreationEvent.get()));
-    firstWorker->terminateAndWait();
-    ASSERT(secondWorker);
-
-    secondCreationEvent->wait();
-    v8::Isolate* secondIsolate = secondWorker->isolate();
-    ASSERT(secondIsolate);
-    EXPECT_EQ(firstIsolate, secondIsolate);
-
-    // Verify that the isolate can run some scripts correctly in the second worker.
-    checkWorkerCanExecuteScript(secondWorker.get());
-    secondWorker->terminateAndWait();
-}
-
-} // namespace blink