Introduce a v8::Platform class that bundles embedder callbacks

src/default-platform.cc

Index: src/default-platform.cc
diff --git a/src/hydrogen-dehoist.h b/src/default-platform.cc
similarity index 80%
copy from src/hydrogen-dehoist.h
copy to src/default-platform.cc
index 140dc6e0e223c87fa955817f1792af76e595bf34..daba039364e5f5d8af26aa3ea781385eec4bcef5 100644
--- a/src/hydrogen-dehoist.h
+++ b/src/default-platform.cc
@@ -25,27 +25,31 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_HYDROGEN_DEHOIST_H_
-#define V8_HYDROGEN_DEHOIST_H_
+#include "v8.h"
 
-#include "hydrogen.h"
+#include "default-platform.h"
 
 namespace v8 {
 namespace internal {
 
 
-class HDehoistIndexComputationsPhase : public HPhase {
- public:
-  explicit HDehoistIndexComputationsPhase(HGraph* graph)
-      : HPhase("H_Dehoist index computations", graph) { }
+DefaultPlatform::DefaultPlatform() {}
 
-  void Run();
 
- private:
-  DISALLOW_COPY_AND_ASSIGN(HDehoistIndexComputationsPhase);
-};
+DefaultPlatform::~DefaultPlatform() {}
 
+void DefaultPlatform::CallOnBackgroundThread(Task *task, bool task_is_slow) {
+  // TODO(jochen): implement.
+  task->Run();
+  delete task;
+}
 
-} }  // namespace v8::internal
 
-#endif  // V8_HYDROGEN_DEHOIST_H_
+void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) {
+  // TODO(jochen): implement.
+  task->Run();
+  delete task;
+}
+
+
+} }  // namespace v8::internal