Bug 1499792: Remove unneeded 'ThrottledEventQueue' forward declarations. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D9008

--HG--
extra : moz-landing-system : lando

dom/base/TabGroup.h

@@ -24,7 +24,6 @@ class nsPIDOMWindowOuter;
 
 namespace mozilla {
 class AbstractThread;
-class ThrottledEventQueue;
 namespace dom {
 class TabChild;
 

dom/base/nsGlobalWindowInner.h

@@ -96,7 +96,6 @@ class PromiseDocumentFlushedResolver;
 
 namespace mozilla {
 class AbstractThread;
-class ThrottledEventQueue;
 namespace dom {
 class BarProp;
 struct ChannelPixelLayout;

dom/base/nsGlobalWindowOuter.h

@@ -91,7 +91,6 @@ struct IdleObserverHolder;
 namespace mozilla {
 class AbstractThread;
 class DOMEventTargetHelper;
-class ThrottledEventQueue;
 namespace dom {
 class BarProp;
 struct ChannelPixelLayout;

dom/base/nsPIDOMWindow.h

@@ -45,7 +45,6 @@ class nsXBLPrototypeHandler;
 typedef uint32_t SuspendTypes;
 
 namespace mozilla {
-class ThrottledEventQueue;
 class AutoplayPermissionManager;
 namespace dom {
 class AudioContext;

dom/workers/WorkerPrivate.h

@@ -26,6 +26,7 @@ class nsIConsoleReportCollector;
 class nsIThreadInternal;
 
 namespace mozilla {
+class ThrottledEventQueue;
 namespace dom {
 
 // If you change this, the corresponding list in nsIWorkerDebugger.idl needs