[heap] Retire the twin brother of CollectGarbage.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index e68f8ec2067c9791b295727f9192f8c6698cea82..558826fc229046c6f636d53d6d32fc17595e8d7b 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -917,7 +917,7 @@ void Heap::CollectAllAvailableGarbage(GarbageCollectionReason gc_reason) {
   const int kMaxNumberOfAttempts = 7;
   const int kMinNumberOfAttempts = 2;
   for (int attempt = 0; attempt < kMaxNumberOfAttempts; attempt++) {
-    if (!CollectGarbage(MARK_COMPACTOR, gc_reason, NULL,
+    if (!CollectGarbage(OLD_SPACE, gc_reason,
                         v8::kGCCallbackFlagCollectAllAvailableGarbage) &&
         attempt + 1 >= kMinNumberOfAttempts) {
       break;
@@ -978,14 +978,16 @@ void Heap::EnsureFillerObjectAtTop() {
   }
 }
 
-bool Heap::CollectGarbage(GarbageCollector collector,
+bool Heap::CollectGarbage(AllocationSpace space,
                           GarbageCollectionReason gc_reason,
-                          const char* collector_reason,
                           const v8::GCCallbackFlags gc_callback_flags) {
   // The VM is in the GC state until exiting this function.
   VMState<GC> state(isolate());
   RuntimeCallTimerScope runtime_timer(isolate(), &RuntimeCallStats::GC);
 
+  const char* collector_reason = NULL;
+  GarbageCollector collector = SelectGarbageCollector(space, &collector_reason);
+
 #ifdef DEBUG
   // Reset the allocation timeout to the GC interval, but make sure to
   // allow at least a few allocations after a collection. The reason