Move platform abstraction to base library

test/cctest/test-cpu-x87.cc

Index: test/cctest/test-cpu-x87.cc
diff --git a/test/cctest/test-cpu-x87.cc b/test/cctest/test-cpu-x87.cc
index f1e07cff21d7a12dcca8f8c7a18f16adde23be6e..555d05af66a7c7c85d98ebaa8136283101ad7df9 100644
--- a/test/cctest/test-cpu-x87.cc
+++ b/test/cctest/test-cpu-x87.cc
@@ -27,7 +27,7 @@
 
 #include "src/v8.h"
 
-#include "src/cpu.h"
+#include "src/base/cpu.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
@@ -35,6 +35,6 @@ using namespace v8::internal;
 
 TEST(RequiredFeaturesX64) {
   // Test for the features required by every x86 CPU in compat/legacy mode.
-  CPU cpu;
+  v8::base::CPU cpu;
   CHECK(cpu.has_sahf());
 }