Move platform abstraction to base library

test/cctest/test-code-stubs-arm.cc

Index: test/cctest/test-code-stubs-arm.cc
diff --git a/test/cctest/test-code-stubs-arm.cc b/test/cctest/test-code-stubs-arm.cc
index 4b9eb1b43ca44a1b0cbbdfab43d7a86a8a8b834b..80403440da55b1ff293a62f9c939fc1ae2688f09 100644
--- a/test/cctest/test-code-stubs-arm.cc
+++ b/test/cctest/test-code-stubs-arm.cc
@@ -29,10 +29,10 @@
 
 #include "src/v8.h"
 
+#include "src/base/platform/platform.h"
 #include "src/code-stubs.h"
 #include "src/factory.h"
 #include "src/macro-assembler.h"
-#include "src/platform.h"
 #include "src/simulator.h"
 #include "test/cctest/cctest.h"
 #include "test/cctest/test-code-stubs.h"
@@ -47,9 +47,8 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
                                               bool inline_fastpath) {
   // 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);
   HandleScope handles(isolate);
   MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size));
@@ -127,7 +126,7 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
 
   CodeDesc desc;
   masm.GetCode(&desc);
-  CPU::FlushICache(buffer, actual_size);
+  CpuFeatures::FlushICache(buffer, actual_size);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }