Fix EstimateMarkingStepSizeTest.

src/heap/gc-idle-time-handler.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 <climits>
 
 #include "src/v8.h"
 
 #include "src/heap/gc-idle-time-handler.h"
 
 namespace v8 {
@@ skipping 12 matching lines @@
         GCIdleTimeHandler::kInitialConservativeMarkingSpeed;
   }
 
   intptr_t marking_step_size = marking_speed_in_bytes_per_ms * idle_time_in_ms;
   if (static_cast<intptr_t>(marking_step_size / idle_time_in_ms) !=
       marking_speed_in_bytes_per_ms) {
     // In the case of an overflow we return maximum marking step size.
     return INT_MAX;
   }
 
-  return static_cast<intptr_t>(marking_step_size *
-                               GCIdleTimeHandler::kConservativeTimeRatio);
+  return Min(static_cast<intptr_t>(marking_step_size *
+                                   GCIdleTimeHandler::kConservativeTimeRatio),
+             static_cast<intptr_t>(INT_MAX));
 }
 }
 }