Split out libplatform into a separate libary

test/cctest/cctest.cc

Index: test/cctest/cctest.cc
diff --git a/test/cctest/cctest.cc b/test/cctest/cctest.cc
index 0be152064e7fd28b0e06356fc98e3e99a2fc5aee..0fbbbb229003486e5a600c6eed0c88c5184fd797 100644
--- a/test/cctest/cctest.cc
+++ b/test/cctest/cctest.cc
@@ -28,6 +28,7 @@
 #include "include/v8.h"
 #include "test/cctest/cctest.h"
 
+#include "include/libplatform/libplatform.h"
 #include "src/debug.h"
 #include "test/cctest/print-extension.h"
 #include "test/cctest/profiler-extension.h"
@@ -138,6 +139,9 @@ static void SuggestTestHarness(int tests) {
 
 int main(int argc, char* argv[]) {
   v8::V8::InitializeICU();
+  v8::Platform* platform = v8::platform::CreateDefaultPlatform(
+      v8::base::OS::NumberOfProcessorsOnline());
+  v8::V8::InitializePlatform(platform);
   i::Isolate::SetCrashIfDefaultIsolateInitialized();
 
   v8::internal::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
@@ -206,6 +210,8 @@ int main(int argc, char* argv[]) {
   CcTest::TearDown();
   // TODO(svenpanne) See comment above.
   // if (!disable_automatic_dispose_) v8::V8::Dispose();
+  v8::V8::ShutdownPlatform();
+  delete platform;
   return 0;
 }