Force scavenge in idle notification if we estimate that it will take long.

src/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 94 matching lines @@
   size_t size = std::numeric_limits<size_t>::max();
   size_t speed = 1;
   size_t time = GCIdleTimeHandler::EstimateMarkCompactTime(size, speed);
   EXPECT_EQ(GCIdleTimeHandler::kMaxMarkCompactTimeInMs, time);
 }
 
 
 TEST(GCIdleTimeHandler, EstimateScavengeTimeInitial) {
   size_t size = 1 * MB;
   size_t time = GCIdleTimeHandler::EstimateScavengeTime(size, 0);
-  EXPECT_EQ(size / GCIdleTimeHandler::kInitialConservativeScavengeSpeed, time);
+  EXPECT_EQ(GCIdleTimeHandler::kLargeIdleTime, time);
 }
 
 
 TEST(GCIdleTimeHandler, EstimateScavengeTimeNonZero) {
   size_t size = 1 * MB;
   size_t speed = 1 * MB;
   size_t time = GCIdleTimeHandler::EstimateScavengeTime(size, speed);
   EXPECT_EQ(size / speed, time);
 }
 
@@ skipping 213 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