Move platform abstraction to base library

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
diff --git a/test/cctest/test-spaces.cc b/test/cctest/test-spaces.cc
index cc73cfcb3efddea30d6842f9f41fd22a88ad6b43..f8ab94e9a74f582346fa2dbbcb6e33acb7ec37da 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -170,11 +170,13 @@ static void VerifyMemoryChunk(Isolate* isolate,
                                                               executable,
                                                               NULL);
   size_t alignment = code_range != NULL && code_range->valid() ?
-                     MemoryChunk::kAlignment : OS::CommitPageSize();
-  size_t reserved_size = ((executable == EXECUTABLE))
-      ? RoundUp(header_size + guard_size + reserve_area_size + guard_size,
-                alignment)
-      : RoundUp(header_size + reserve_area_size, OS::CommitPageSize());
+                     MemoryChunk::kAlignment : v8::base::OS::CommitPageSize();
+  size_t reserved_size =
+      ((executable == EXECUTABLE))
+          ? RoundUp(header_size + guard_size + reserve_area_size + guard_size,
+                    alignment)
+          : RoundUp(header_size + reserve_area_size,
+                    v8::base::OS::CommitPageSize());
   CHECK(memory_chunk->size() == reserved_size);
   CHECK(memory_chunk->area_start() < memory_chunk->address() +
                                      memory_chunk->size());