Perform scavenge in idle tasks.

test/cctest/cctest.h

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 507 matching lines @@
   CHECK(result->SameValue(expected));
 }
 
 
 static inline void ExpectUndefined(const char* code) {
   v8::Local<v8::Value> result = CompileRun(code);
   CHECK(result->IsUndefined());
 }
 
 
+static inline void DisableInlineAllocationSteps(v8::internal::NewSpace* space) {
+  space->LowerInlineAllocationLimit(0);
+}
+
+
 // Helper function that simulates a full new-space in the heap.
 static inline bool FillUpOnePage(v8::internal::NewSpace* space) {
+  DisableInlineAllocationSteps(space);
   v8::internal::AllocationResult allocation = space->AllocateRawUnaligned(
       v8::internal::Page::kMaxRegularHeapObjectSize);
   if (allocation.IsRetry()) return false;
   v8::internal::HeapObject* free_space = NULL;
   CHECK(allocation.To(&free_space));
   space->heap()->CreateFillerObjectAt(
       free_space->address(), v8::internal::Page::kMaxRegularHeapObjectSize);
   return true;
 }
 
 
 // Helper function that simulates a fill new-space in the heap.
 static inline void AllocateAllButNBytes(v8::internal::NewSpace* space,
                                         int extra_bytes) {
+  DisableInlineAllocationSteps(space);
   int space_remaining = static_cast<int>(*space->allocation_limit_address() -
                                          *space->allocation_top_address());
   CHECK(space_remaining >= extra_bytes);
   int new_linear_size = space_remaining - extra_bytes;
   if (new_linear_size == 0) return;
   v8::internal::AllocationResult allocation =
       space->AllocateRawUnaligned(new_linear_size);
   v8::internal::HeapObject* free_space = NULL;
   CHECK(allocation.To(&free_space));
   space->heap()->CreateFillerObjectAt(free_space->address(), new_linear_size);
@@ skipping 85 matching lines @@
   HandleAndZoneScope() {}
 
   // Prefixing the below with main_ reduces a lot of naming clashes.
   i::Zone* main_zone() { return &main_zone_; }
 
  private:
   i::Zone main_zone_;
 };
 
 #endif  // ifndef CCTEST_H_