- Added simple memory reduction behavior for IdleNotification....

src/heap.h

 // Copyright 2006-2008 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 262 matching lines @@
     return reinterpret_cast<Address>(&always_allocate_scope_depth_);
   }
 
   static Address* NewSpaceAllocationTopAddress() {
     return new_space_.allocation_top_address();
   }
   static Address* NewSpaceAllocationLimitAddress() {
     return new_space_.allocation_limit_address();
   }
 
+  // Uncommit unused semi space.
+  static bool UncommitFromSpace() { return new_space_.UncommitFromSpace(); }
+
 #ifdef ENABLE_HEAP_PROTECTION
   // Protect/unprotect the heap by marking all spaces read-only/writable.
   static void Protect();
   static void Unprotect();
 #endif
 
   // Allocates and initializes a new JavaScript object based on a
   // constructor.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
@@ skipping 494 matching lines @@
   static inline void ScavengeObject(HeapObject** p, HeapObject* object);
 
   // Clear a range of remembered set addresses corresponding to the object
   // area address 'start' with size 'size_in_bytes', eg, when adding blocks
   // to the free list.
   static void ClearRSetRange(Address start, int size_in_bytes);
 
   // Rebuild remembered set in old and map spaces.
   static void RebuildRSets();
 
+  // Commits from space if it is uncommitted.
+  static void EnsureFromSpaceIsCommitted();
+
   //
   // Support for the API.
   //
 
   static bool CreateApiObjects();
 
   // Attempt to find the number in a small cache.  If we finds it, return
   // the string representation of the number.  Otherwise return undefined.
   static Object* GetNumberStringCache(Object* number);
 
@@ skipping 654 matching lines @@
   int marked_count_;
 
   // The count from the end of the previous full GC.  Will be zero if there
   // was no previous full GC.
   int previous_marked_count_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_