[heap] Remove unused step_size_in_bytes in AdvanceIncrementalMarking.

src/heap/incremental-marking.cc

 // Copyright 2012 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 "src/heap/incremental-marking.h"
 
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
 #include "src/conversions.h"
 #include "src/heap/gc-idle-time-handler.h"
@@ skipping 997 matching lines @@
   }
 }
 
 
 void IncrementalMarking::Epilogue() {
   was_activated_ = false;
   finalize_marking_completed_ = false;
   incremental_marking_finalization_rounds_ = 0;
 }
 
-
 double IncrementalMarking::AdvanceIncrementalMarking(
-    intptr_t step_size_in_bytes, double deadline_in_ms,
-    IncrementalMarking::StepActions step_actions) {
+    double deadline_in_ms, IncrementalMarking::StepActions step_actions) {
   DCHECK(!IsStopped());
 
-  if (step_size_in_bytes == 0) {
-    step_size_in_bytes = GCIdleTimeHandler::EstimateMarkingStepSize(
-        GCIdleTimeHandler::kIncrementalMarkingStepTimeInMs,
-        heap()
-            ->tracer()
-            ->FinalIncrementalMarkCompactSpeedInBytesPerMillisecond());
-  }
-
+  intptr_t step_size_in_bytes = GCIdleTimeHandler::EstimateMarkingStepSize(
+      GCIdleTimeHandler::kIncrementalMarkingStepTimeInMs,
+      heap()
+          ->tracer()
+          ->FinalIncrementalMarkCompactSpeedInBytesPerMillisecond());
   double remaining_time_in_ms = 0.0;
   intptr_t bytes_processed = 0;
+
   do {
     bytes_processed =
         Step(step_size_in_bytes, step_actions.completion_action,
              step_actions.force_marking, step_actions.force_completion);
     remaining_time_in_ms =
         deadline_in_ms - heap()->MonotonicallyIncreasingTimeInMs();
   } while (bytes_processed > 0 &&
            remaining_time_in_ms >=
                2.0 * GCIdleTimeHandler::kIncrementalMarkingStepTimeInMs &&
            !IsComplete() &&
@@ skipping 202 matching lines @@
 void IncrementalMarking::IncrementIdleMarkingDelayCounter() {
   idle_marking_delay_counter_++;
 }
 
 
 void IncrementalMarking::ClearIdleMarkingDelayCounter() {
   idle_marking_delay_counter_ = 0;
 }
 }  // namespace internal
 }  // namespace v8