Resolve promises synchronously sometimes

third_party/WebKit/Source/core/animation/Animation.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/StyleChangeReason.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/events/AnimationPlaybackEvent.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/probe/CoreProbes.h"
 #include "platform/RuntimeEnabledFeatures.h"
+#include "platform/ScriptForbiddenScope.h"
 #include "platform/WebTaskRunner.h"
 #include "platform/animation/CompositorAnimationPlayer.h"
 #include "platform/heap/Persistent.h"
 #include "platform/instrumentation/tracing/TraceEvent.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "wtf/MathExtras.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
@@ skipping 974 matching lines @@
 
   // Ordering is important, the ready promise should resolve/reject before
   // the finished promise.
   if (animation_->ready_promise_ && new_play_state != old_play_state) {
     if (new_play_state == kIdle) {
       if (animation_->ready_promise_->GetState() ==
           AnimationPromise::kPending) {
         animation_->ready_promise_->Reject(DOMException::Create(kAbortError));
       }
       animation_->ready_promise_->Reset();
-      animation_->ResolvePromiseAsync(animation_->ready_promise_.Get());
+      animation_->ResolvePromiseMaybeAsync(animation_->ready_promise_.Get());
     } else if (old_play_state == kPending) {
-      animation_->ResolvePromiseAsync(animation_->ready_promise_.Get());
+      animation_->ResolvePromiseMaybeAsync(animation_->ready_promise_.Get());
     } else if (new_play_state == kPending) {
       DCHECK_NE(animation_->ready_promise_->GetState(),
                 AnimationPromise::kPending);
       animation_->ready_promise_->Reset();
     }
   }
 
   if (animation_->finished_promise_ && new_play_state != old_play_state) {
     if (new_play_state == kIdle) {
       if (animation_->finished_promise_->GetState() ==
           AnimationPromise::kPending) {
         animation_->finished_promise_->Reject(
             DOMException::Create(kAbortError));
       }
       animation_->finished_promise_->Reset();
     } else if (new_play_state == kFinished) {
-      animation_->ResolvePromiseAsync(animation_->finished_promise_.Get());
+      animation_->ResolvePromiseMaybeAsync(animation_->finished_promise_.Get());
     } else if (old_play_state == kFinished) {
       animation_->finished_promise_->Reset();
     }
   }
 
   if (old_play_state != new_play_state &&
       (old_play_state == kIdle || new_play_state == kIdle)) {
     animation_->SetOutdated();
   }
 
@@ skipping 58 matching lines @@
     return;
 
   Element& target = *ToKeyframeEffectReadOnly(content_.Get())->Target();
 
   if (CSSAnimations::IsAffectedByKeyframesFromScope(target, tree_scope))
     target.SetNeedsStyleRecalc(kLocalStyleChange,
                                StyleChangeReasonForTracing::Create(
                                    StyleChangeReason::kStyleSheetChange));
 }
 
-void Animation::ResolvePromiseAsync(AnimationPromise* promise) {
-  TaskRunnerHelper::Get(TaskType::kDOMManipulation, GetExecutionContext())
-      ->PostTask(BLINK_FROM_HERE,
-                 WTF::Bind(&AnimationPromise::Resolve<Animation*>,
-                           WrapPersistent(promise), WrapPersistent(this)));
+void Animation::ResolvePromiseMaybeAsync(AnimationPromise* promise) {
+  if (ScriptForbiddenScope::IsScriptForbidden()) {
+    TaskRunnerHelper::Get(TaskType::kDOMManipulation, GetExecutionContext())
+        ->PostTask(BLINK_FROM_HERE,
+                   WTF::Bind(&AnimationPromise::Resolve<Animation*>,
+                             WrapPersistent(promise), WrapPersistent(this)));
+  } else {
+    promise->Resolve(this);
+  }
 }
 
 DEFINE_TRACE(Animation) {
   visitor->Trace(content_);
   visitor->Trace(timeline_);
   visitor->Trace(pending_finished_event_);
   visitor->Trace(pending_cancelled_event_);
   visitor->Trace(finished_promise_);
   visitor->Trace(ready_promise_);
   visitor->Trace(compositor_player_);
@@ skipping 21 matching lines @@
   DCHECK(!compositor_player_);
 }
 
 void Animation::CompositorAnimationPlayerHolder::Detach() {
   DCHECK(compositor_player_);
   compositor_player_->SetAnimationDelegate(nullptr);
   animation_ = nullptr;
   compositor_player_.reset();
 }
 }  // namespace blink