Make transition to reduce memory mode more conservative in idle time handler.

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 76 matching lines @@
     handler()->Compute(idle_time_ms, heap_state);
     EXPECT_EQ(GCIdleTimeHandler::kReduceLatency, handler()->mode());
   }
 
   static const size_t kSizeOfObjects = 100 * MB;
   static const size_t kMarkCompactSpeed = 200 * KB;
   static const size_t kMarkingSpeed = 200 * KB;
   static const size_t kScavengeSpeed = 100 * KB;
   static const size_t kNewSpaceCapacity = 1 * MB;
   static const size_t kNewSpaceAllocationThroughput = 10 * KB;
-  static const int kMaxNotifications = 100;
+  static const int kMaxNotifications = 1000;
 
  private:
   GCIdleTimeHandler handler_;
 };
 
 }  // namespace
 
 
 TEST(GCIdleTimeHandler, EstimateMarkingStepSizeInitial) {
   size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(1, 0);
@@ skipping 512 matching lines @@
     handler()->NotifyMarkCompact();
     handler()->NotifyIdleMarkCompact();
   }
   action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DONE, action.type);
 }
 
 
 }  // namespace internal
 }  // namespace v8