The TPH collector API needs to return a boolean.

Bug: v8:9533

Change-Id: Ia2239a591abf68f64efe4a993671b7184a5cf5cf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2013115
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65932}

src/heap/heap.cc

@@ -1948,6 +1948,10 @@ bool Heap::PerformGarbageCollection(
     GarbageCollector collector, const v8::GCCallbackFlags gc_callback_flags) {
   DisallowJavascriptExecution no_js(isolate());
 
+  if (V8_ENABLE_THIRD_PARTY_HEAP_BOOL) {
+    return tp_heap_->CollectGarbage();
+  }
+
   size_t freed_global_handles = 0;
 
   if (!IsYoungGenerationCollector(collector)) {

src/heap/third-party/heap-api.h

@@ -25,7 +25,7 @@ class Heap {
 
   Address GetObjectFromInnerPointer(Address inner_pointer);
 
-  void CollectGarbage();
+  bool CollectGarbage();
 };
 
 }  // namespace third_party_heap