Unified the structure of VirtualMemory implementations across platforms a bit.

src/platform-nullos.cc

 // Copyright 2012 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 299 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 int OS::StackWalk(Vector<OS::StackFrame> frames) {
   UNIMPLEMENTED();
   return 0;
 }
 
 
+VirtualMemory::VirtualMemory() {
+  UNIMPLEMENTED();
+}
+
+
+VirtualMemory::VirtualMemory(size_t size) {
+  UNIMPLEMENTED();
+}
+
+
 VirtualMemory::VirtualMemory(size_t size, void* address_hint) {
   UNIMPLEMENTED();
 }
 
 
 VirtualMemory::~VirtualMemory() {
   UNIMPLEMENTED();
 }
 
 
 bool VirtualMemory::IsReserved() {
   UNIMPLEMENTED();
   return false;
 }
 
 
+void VirtualMemory::Reset() {
+  UNIMPLEMENTED();
+}
+
+
 bool VirtualMemory::Commit(void* address, size_t size, bool executable) {
   UNIMPLEMENTED();
   return false;
 }
 
 
 bool VirtualMemory::Uncommit(void* address, size_t size) {
   UNIMPLEMENTED();
   return false;
 }
 
 
 bool VirtualMemory::Guard(void* address) {
   UNIMPLEMENTED();
   return false;
 }
 
 
+void* VirtualMemory::ReserveRegion(size_t size) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool VirtualMemory::UncommitRegion(void* base, size_t size) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
 bool VirtualMemory::HasLazyCommits() {
   // TODO(alph): implement for the platform.
   return false;
 }
 
 
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() {
     UNIMPLEMENTED();
@@ skipping 156 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 void ProfileSampler::Stop() {
   UNIMPLEMENTED();
 }
 
 
 } }  // namespace v8::internal