Refactor TimeBase to post tasks. Workers to use real Idle tasks.

Source/core/dom/ScriptRunnerTest.cpp

Index: Source/core/dom/ScriptRunnerTest.cpp
diff --git a/Source/core/dom/ScriptRunnerTest.cpp b/Source/core/dom/ScriptRunnerTest.cpp
index 6ed5b093bf7590f899900ff5b300c29ac8593d5f..4b6505de74748ef6244369528450eda222257500 100644
--- a/Source/core/dom/ScriptRunnerTest.cpp
+++ b/Source/core/dom/ScriptRunnerTest.cpp
@@ -87,12 +87,14 @@ class ScriptRunnerTest : public testing::Test {
 public:
     void SetUp() override
     {
+        Scheduler::shutdown();

[Sami, 2015/02/27 18:29:52]

I wonder if we should have some testing helper for temporarily replacing the
Platform? It's spectacularly easy to get this wrong.

+
+        m_oldPlatform = Platform::current();
+        Platform::initialize(&m_platform);
         m_document = Document::create();
         m_element = m_document->createElement("foo", ASSERT_NO_EXCEPTION);
 
         m_scriptRunner = ScriptRunner::create(m_document.get());
-        m_oldPlatform = Platform::current();
-        Platform::initialize(&m_platform);
         m_platform.setShouldYield(false);
         m_platform.setShouldYieldEveryOtherTime(false);
     }