Relax test condition to make it less brittle.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 3f444b3708a833715d383878312928404c338943..8b618d4906125d77c88361235bedac41405f0226 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -13438,6 +13438,8 @@ TEST(SourceURLInStackTrace) {
 
 
 // Test that idle notification can be handled and eventually returns true.
+// This just checks the contract of the IdleNotification() function,
+// and does not verify that it does reasonable work.
 THREADED_TEST(IdleNotification) {
   v8::HandleScope scope;
   LocalContext env;
@@ -13463,6 +13465,8 @@ THREADED_TEST(IdleNotification) {
 }
 
 // Test that idle notification can be handled and eventually returns true.
+// This just checks the contract of the IdleNotification() function,
+// and does not verify that it does reasonable work.
 THREADED_TEST(IdleNotificationWithHint) {
   v8::HandleScope scope;
   LocalContext env;
@@ -13488,7 +13492,7 @@ THREADED_TEST(IdleNotificationWithHint) {
   }
   CHECK(rv == true);
   intptr_t new_size = HEAP->SizeOfObjects();
-  CHECK(no_idle_work || new_size < 3 * old_size / 4);
+  CHECK(no_idle_work || new_size < old_size);
 }