Revert r16648, r16641, r16638 and r16637.

test/cctest/test-platform-win32.cc

Index: test/cctest/test-platform-win32.cc
diff --git a/test/cctest/test-platform-win32.cc b/test/cctest/test-platform-win32.cc
index 3db5f39663860b794c18f442d6fac2fa7956316f..d7fdab11edc7d2f400d0542f69ede59c7e7262ef 100644
--- a/test/cctest/test-platform-win32.cc
+++ b/test/cctest/test-platform-win32.cc
@@ -38,6 +38,20 @@
 using namespace ::v8::internal;
 
 
+TEST(VirtualMemory) {
+  VirtualMemory* vm = new VirtualMemory(1 * MB);
+  CHECK(vm->IsReserved());
+  void* block_addr = vm->address();
+  size_t block_size = 4 * KB;
+  CHECK(vm->Commit(block_addr, block_size, false));
+  // Check whether we can write to memory.
+  int* addr = static_cast<int*>(block_addr);
+  addr[KB-1] = 2;
+  CHECK(vm->Uncommit(block_addr, block_size));
+  delete vm;
+}
+
+
 TEST(GetCurrentProcessId) {
   CHECK_EQ(static_cast<int>(::GetCurrentProcessId()),
            OS::GetCurrentProcessId());