[Isolates] ScavengeVisitor gets member Heap*.

src/isolate.h

 // Copyright 2010 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 1083 matching lines @@
 class ExecutionAccess BASE_EMBEDDED {
  public:
   ExecutionAccess();
   ~ExecutionAccess();
 };
 
 
 // Support for checking for stack-overflows in C++ code.
 class StackLimitCheck BASE_EMBEDDED {
  public:
+  explicit StackLimitCheck(Isolate* isolate) : isolate_(isolate) { }
+
   bool HasOverflowed() const {
-    StackGuard* stack_guard = Isolate::Current()->stack_guard();
+    StackGuard* stack_guard = isolate_->stack_guard();
     // Stack has overflowed in C++ code only if stack pointer exceeds the C++
     // stack guard and the limits are not set to interrupt values.
     // TODO(214): Stack overflows are ignored if a interrupt is pending. This
     // code should probably always use the initial C++ limit.
     return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) &&
            stack_guard->IsStackOverflow();
   }
+ private:
+  Isolate* isolate_;
 };
 
 
 // Support for temporarily postponing interrupts. When the outermost
 // postpone scope is left the interrupts will be re-enabled and any
 // interrupts that occurred while in the scope will be taken into
 // account.
 class PostponeInterruptsScope BASE_EMBEDDED {
  public:
   PostponeInterruptsScope() {
@@ skipping 45 matching lines @@
 #define ISOLATED_CLASS class
 
 } }  // namespace v8::internal
 
 // TODO(isolates): Get rid of these -inl.h includes and place them only where
 //                 they're needed.
 #include "allocation-inl.h"
 #include "zone-inl.h"
 
 #endif  // V8_ISOLATE_H_