[heap] Introduce enum of garbage collection reasons.

test/cctest/test-identity-map.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/factory.h"
 #include "src/identity-map.h"
 #include "src/isolate.h"
 #include "src/objects.h"
 // FIXME(mstarzinger, marja): This is weird, but required because of the missing
 // (disallowed) include: src/factory.h -> src/objects-inl.h
@@ skipping 317 matching lines @@
   Handle<Object> num_keys[] = {t.num(2.1), t.num(2.4), t.num(3.3), t.num(4.3),
                                t.num(7.5), t.num(6.4), t.num(7.3), t.num(8.3),
                                t.num(8.9), t.num(10.4)};
 
   // Insert some objects that should be in new space.
   for (size_t i = 0; i < arraysize(num_keys); i++) {
     t.map.Set(num_keys[i], &num_keys[i]);
   }
 
   // Do an explicit, real GC.
-  t.heap()->CollectGarbage(i::NEW_SPACE);
+  t.heap()->CollectGarbage(i::NEW_SPACE, i::GarbageCollectionReason::kTesting);
 
   // Check that searching for the numbers finds the same values.
   for (size_t i = 0; i < arraysize(num_keys); i++) {
     t.CheckFind(num_keys[i], &num_keys[i]);
     t.CheckGet(num_keys[i], &num_keys[i]);
   }
 }
 
 
 TEST(CanonicalHandleScope) {
@@ skipping 31 matching lines @@
 
   // Test ordinary heap objects.
   Handle<HeapNumber> number1 = isolate->factory()->NewHeapNumber(3.3);
   Handle<String> string1 =
       isolate->factory()->NewStringFromAsciiChecked("test");
   next_handle = isolate->handle_scope_data()->next;
   Handle<HeapNumber> number2(*number1);
   Handle<String> string2(*string1);
   CHECK_EQ(number1.location(), number2.location());
   CHECK_EQ(string1.location(), string2.location());
-  heap->CollectAllGarbage();
+  CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
   Handle<HeapNumber> number3(*number2);
   Handle<String> string3(*string2);
   CHECK_EQ(number1.location(), number3.location());
   CHECK_EQ(string1.location(), string3.location());
   // Check that no new handles have been allocated.
   CHECK_EQ(next_handle, isolate->handle_scope_data()->next);
 
   // Inner handle scope do not create canonical handles.
   {
     HandleScope inner(isolate);
@@ skipping 18 matching lines @@
     CHECK_NE(string4.location(), string6.location());
     CHECK_NE(number1.location(), number6.location());
     CHECK_NE(string1.location(), string6.location());
     CHECK_EQ(number5.location(), number6.location());
     CHECK_EQ(string5.location(), string6.location());
   }
 }
 
 }  // namespace internal
 }  // namespace v8