Fix build after r23316.

test/heap-unittests/heap-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 "test/heap-unittests/heap-unittest.h"
 
 #include <limits>
 
 
 namespace v8 {
@@ skipping 89 matching lines @@
   EXPECT_EQ(DO_INCREMENTAL_MARKING, action.type);
 }
 
 
 TEST_F(GCIdleTimeHandlerTest, IncrementalMarking1) {
   GCIdleTimeHandler::HeapState heap_state = DefaultHeapState();
   size_t speed = heap_state.incremental_marking_speed_in_bytes_per_ms;
   int idle_time_ms = 10;
   GCIdleTimeAction action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DO_INCREMENTAL_MARKING, action.type);
-  EXPECT_GT(speed * idle_time_ms, action.parameter);
+  EXPECT_GT(speed * static_cast<size_t>(idle_time_ms),
+            static_cast<size_t>(action.parameter));
   EXPECT_LT(0, action.parameter);
 }
 
 
 TEST_F(GCIdleTimeHandlerTest, IncrementalMarking2) {
   GCIdleTimeHandler::HeapState heap_state = DefaultHeapState();
   heap_state.incremental_marking_stopped = true;
   size_t speed = heap_state.incremental_marking_speed_in_bytes_per_ms;
   int idle_time_ms = 10;
   GCIdleTimeAction action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DO_INCREMENTAL_MARKING, action.type);
-  EXPECT_GT(speed * idle_time_ms, action.parameter);
+  EXPECT_GT(speed * static_cast<size_t>(idle_time_ms),
+            static_cast<size_t>(action.parameter));
   EXPECT_LT(0, action.parameter);
 }
 
 
 TEST_F(GCIdleTimeHandlerTest, NotEnoughTime) {
   GCIdleTimeHandler::HeapState heap_state = DefaultHeapState();
   heap_state.incremental_marking_stopped = true;
   heap_state.can_start_incremental_marking = false;
   size_t speed = heap_state.mark_compact_speed_in_bytes_per_ms;
   int idle_time_ms = heap_state.size_of_objects / speed - 1;
@@ skipping 68 matching lines @@
   for (int i = 0; i < GCIdleTimeHandler::kIdleScavengeThreshold; i++) {
     handler()->NotifyScavenge();
   }
   action = handler()->Compute(idle_time_ms, heap_state);
   EXPECT_EQ(DO_INCREMENTAL_MARKING, action.type);
 }
 
 
 }  // namespace internal
 }  // namespace v8