[cctest] Move most heap related tests to test/cctest/heap and clean wrt IWYU

test/cctest/test-weakmaps.cc

 // Copyright 2011 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 16 matching lines @@
 
 // TODO(mythria): Remove this after this flag is turned on globally
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include <utility>
 
 #include "src/v8.h"
 
 #include "src/global-handles.h"
 #include "test/cctest/cctest.h"
+#include "test/cctest/heap/utils-inl.h"
 
 using namespace v8::internal;
 
 static Isolate* GetIsolateFrom(LocalContext* context) {
   return reinterpret_cast<Isolate*>((*context)->GetIsolate());
 }
 
 
 static Handle<JSWeakMap> AllocateJSWeakMap(Isolate* isolate) {
   Handle<JSWeakMap> weakmap = isolate->factory()->NewJSWeakMap();
@@ skipping 213 matching lines @@
   {
     HandleScope scope(isolate);
     AllocateJSWeakMap(isolate);
     SimulateIncrementalMarking(heap);
   }
   // The weak map is marked black here but leaving the handle scope will make
   // the object unreachable. Aborting incremental marking will clear all the
   // marking bits which makes the weak map garbage.
   heap->CollectAllGarbage();
 }