Move platform abstraction to base library

test/cctest/test-macro-assembler-x87.cc

Index: test/cctest/test-macro-assembler-x87.cc
diff --git a/test/cctest/test-macro-assembler-x87.cc b/test/cctest/test-macro-assembler-x87.cc
index 1dd07da2e05e14ac91b5030e8533fe0f39cd079f..9aa40c0b104399d66a0808624ad79df0e0eb44e3 100644
--- a/test/cctest/test-macro-assembler-x87.cc
+++ b/test/cctest/test-macro-assembler-x87.cc
@@ -30,9 +30,9 @@
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
+#include "src/base/platform/platform.h"
 #include "src/factory.h"
 #include "src/macro-assembler.h"
-#include "src/platform.h"
 #include "src/serialize.h"
 
 using namespace v8::internal;
@@ -54,9 +54,8 @@ TEST(LoadAndStoreWithRepresentation) {
 
   // Allocate an executable page of memory.
   size_t actual_size;
-  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
-                                                 &actual_size,
-                                                 true));
+  byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
+      Assembler::kMinimalBufferSize, &actual_size, true));
   CHECK(buffer);
   Isolate* isolate = CcTest::i_isolate();
   HandleScope handles(isolate);