[heap] Introduce enum of garbage collection reasons.

test/cctest/cctest.cc

 // Copyright 2008 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 89 matching lines @@
       EmptyMessageQueues(isolate_);
     } else {
       EmptyMessageQueues(isolate_);
     }
     isolate_->Exit();
   }
 }
 
 i::Heap* CcTest::heap() { return i_isolate()->heap(); }
 
+void CcTest::CollectGarbage(i::AllocationSpace space) {
+  heap()->CollectGarbage(space, i::GarbageCollectionReason::kTesting);
+}
+
+void CcTest::CollectAllGarbage(int flags) {
+  heap()->CollectAllGarbage(flags, i::GarbageCollectionReason::kTesting);
+}
+
+void CcTest::CollectAllAvailableGarbage() {
+  heap()->CollectAllAvailableGarbage(i::GarbageCollectionReason::kTesting);
+}
+
 v8::base::RandomNumberGenerator* CcTest::random_number_generator() {
   return InitIsolateOnce()->random_number_generator();
 }
 
 v8::Local<v8::Object> CcTest::global() {
   return isolate()->GetCurrentContext()->Global();
 }
 
 void CcTest::InitializeVM() {
   CHECK(!v8::base::NoBarrier_Load(&isolate_used_));
@@ skipping 195 matching lines @@
   CcTest::TearDown();
   // TODO(svenpanne) See comment above.
   // if (!disable_automatic_dispose_) v8::V8::Dispose();
   v8::V8::ShutdownPlatform();
   delete platform;
   return 0;
 }
 
 RegisterThreadedTest *RegisterThreadedTest::first_ = NULL;
 int RegisterThreadedTest::count_ = 0;