Re-land: Distinguish beween final incremental mark-compact and full mark-compact event in IdleNotif…

test/unittests/heap/gc-idle-time-handler-unittest.cc

 // Copyright 2014 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 <limits>
 
 #include "src/heap/gc-idle-time-handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace v8 {
@@ skipping 162 matching lines @@
 }
 
 
 TEST_F(GCIdleTimeHandlerTest, DontDoMarkCompact) {
   size_t idle_time_in_ms = 1;
   EXPECT_FALSE(GCIdleTimeHandler::ShouldDoMarkCompact(
       idle_time_in_ms, kSizeOfObjects, kMarkingSpeed));
 }
 
 
+TEST_F(GCIdleTimeHandlerTest, ShouldDoFinalIncrementalMarkCompact) {
+  size_t idle_time_in_ms = 16;
+  EXPECT_TRUE(GCIdleTimeHandler::ShouldDoFinalIncrementalMarkCompact(
+      idle_time_in_ms, 0, 0));
+}
+
+
+TEST_F(GCIdleTimeHandlerTest, DontDoFinalIncrementalMarkCompact) {
+  size_t idle_time_in_ms = 1;
+  EXPECT_FALSE(GCIdleTimeHandler::ShouldDoFinalIncrementalMarkCompact(
+      idle_time_in_ms, kSizeOfObjects, kMarkingSpeed));
+}
+
+
 TEST_F(GCIdleTimeHandlerTest, ContextDisposeLowRate) {
   GCIdleTimeHandler::HeapState heap_state = DefaultHeapState();
   heap_state.contexts_disposed = 1;
   heap_state.incremental_marking_stopped = true;
   int idle_time_ms = 0;
   GCIdleTimeAction action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DO_NOTHING, action.type);
 }
 
 
@@ skipping 221 matching lines @@
   // Emulate mutator work.
   for (int i = 0; i < GCIdleTimeHandler::kIdleScavengeThreshold; i++) {
     handler()->NotifyScavenge();
   }
   action = handler()->Compute(0, heap_state);
   EXPECT_EQ(DO_NOTHING, action.type);
 }
 
 }  // namespace internal
 }  // namespace v8