Revert of More regular Platform implementations in unit tests (reland.)

third_party/WebKit/Source/core/dom/ScriptRunnerTest.cpp

 // 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 "core/dom/ScriptRunner.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/ScriptLoader.h"
 #include "platform/heap/Handle.h"
 #include "platform/scheduler/CancellableTaskFactory.h"
-#include "platform/testing/TestingPlatformSupport.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebViewScheduler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Invoke;
 using ::testing::ElementsAre;
 using ::testing::Return;
 using ::testing::WhenSorted;
 using ::testing::ElementsAreArray;
@@ skipping 65 matching lines @@
 
     WebTaskRunner* clone() override
     {
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 
     Deque<OwnPtr<WebTaskRunner::Task>>* m_tasks; // NOT OWNED
 };
 
-class MockPlatform : public TestingPlatformSupport, public WebScheduler {
+class MockPlatform : public Platform, public WebScheduler {
 public:
     MockPlatform()
         : m_mockWebThread(this)
         , m_mockWebTaskRunner(&m_tasks)
     {
     }
 
+    void cryptographicallyRandomValues(unsigned char* buffer, size_t length) override
+    {
+        RELEASE_ASSERT_NOT_REACHED();
+    }
+
+    const unsigned char* getTraceCategoryEnabledFlag(const char* categoryName) override
+    {
+        static const unsigned char tracingIsDisabled = 0;
+        return &tracingIsDisabled;
+    }
+
     WebThread* currentThread() override { return &m_mockWebThread; }
 
     void runSingleTask()
     {
         if (m_tasks.isEmpty())
             return;
         m_tasks.takeFirst()->run();
     }
 
     void runAllTasks()
@@ skipping 29 matching lines @@
     void onNavigationStarted() override { }
 
 private:
     MockWebThread m_mockWebThread;
     Deque<OwnPtr<WebTaskRunner::Task>> m_tasks;
     MockWebTaskRunner m_mockWebTaskRunner;
 };
 
 class ScriptRunnerTest : public testing::Test {
 public:
-    ScriptRunnerTest()
-        : m_document(Document::create())
-        , m_element(m_document->createElement("foo", ASSERT_NO_EXCEPTION))
-    {
-    }
-
     void SetUp() override
     {
+        m_document = Document::create();
+        m_element = m_document->createElement("foo", ASSERT_NO_EXCEPTION);
+
+        m_oldPlatform = Platform::current();
+
+        // Force Platform::initialize to create a new one pointing at MockPlatform.
+        Platform::initialize(&m_platform);
+
         // We have to create ScriptRunner after initializing platform, because we need
         // Platform::current()->currentThread()->scheduler()->loadingTaskRunner()
         // to be initialized before creating ScriptRunner to save it in constructor.
         m_scriptRunner = ScriptRunner::create(m_document.get());
     }
 
     void TearDown() override
     {
         m_scriptRunner.release();
+        Platform::initialize(m_oldPlatform);
     }
 
     RefPtrWillBePersistent<Document> m_document;
     RefPtrWillBePersistent<Element> m_element;
-    MockPlatform m_platform;
     OwnPtrWillBePersistent<ScriptRunner> m_scriptRunner;
     WTF::Vector<int> m_order;
+    MockPlatform m_platform;
+    Platform* m_oldPlatform; // NOT OWNED
 };
 
 TEST_F(ScriptRunnerTest, QueueSingleScript_Async)
 {
     OwnPtrWillBeRawPtr<MockScriptLoader> scriptLoader = MockScriptLoader::create(m_element.get());
     m_scriptRunner->queueScriptForExecution(scriptLoader.get(), ScriptRunner::ASYNC_EXECUTION);
     m_scriptRunner->notifyScriptReady(scriptLoader.get(), ScriptRunner::ASYNC_EXECUTION);
 
     EXPECT_CALL(*scriptLoader, execute());
     m_platform.runAllTasks();
@@ skipping 364 matching lines @@
 #endif
 
     // m_scriptRunner is gone. We need to make sure that ScriptRunner::Task do not access dead object.
     EXPECT_CALL(*scriptLoader1, execute()).Times(0);
     EXPECT_CALL(*scriptLoader2, execute()).Times(0);
 
     m_platform.runAllTasks();
 }
 
 } // namespace blink