Fix estimation of released pages when collecting evacuation candidates.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 5fc79f6a39b9641f94268bb5b3ee2dcf516926c3..62b673f5b2c4c7d51a51088257ea3c3694718cfd 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -613,8 +613,10 @@ void Heap::CollectAllAvailableGarbage(const char* gc_reason) {
                                      kReduceMemoryFootprintMask);
   isolate_->compilation_cache()->Clear();
   const int kMaxNumberOfAttempts = 7;
+  const int kMinNumberOfAttempts = 2;
   for (int attempt = 0; attempt < kMaxNumberOfAttempts; attempt++) {
-    if (!CollectGarbage(OLD_POINTER_SPACE, MARK_COMPACTOR, gc_reason, NULL)) {
+    if (!CollectGarbage(OLD_POINTER_SPACE, MARK_COMPACTOR, gc_reason, NULL) &&
+        attempt + 1 >= kMinNumberOfAttempts) {
       break;
     }
   }