Revert of Move throttling of background timers into the renderer scheduler

third_party/WebKit/Source/core/testing/NullExecutionContext.h

Index: third_party/WebKit/Source/core/testing/NullExecutionContext.h
diff --git a/third_party/WebKit/Source/core/testing/NullExecutionContext.h b/third_party/WebKit/Source/core/testing/NullExecutionContext.h
index 4838afdc774c1a1d1bbe703193271a84e97385d9..9cb49be3c09e5b414c9be2faf6ed805698c5d1cd 100644
--- a/third_party/WebKit/Source/core/testing/NullExecutionContext.h
+++ b/third_party/WebKit/Source/core/testing/NullExecutionContext.h
@@ -37,6 +37,8 @@
     SecurityContext& securityContext() override { return *this; }
     DOMTimerCoordinator* timers() override { return nullptr; }
 
+    double timerAlignmentInterval() const;
+
     void addConsoleMessage(PassRefPtrWillBeRawPtr<ConsoleMessage>) override { }
     void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) override { }