A64: Synchronize with r18084.

src/default-platform.cc

Index: src/default-platform.cc
diff --git a/src/a64/frames-a64.cc b/src/default-platform.cc
similarity index 78%
copy from src/a64/frames-a64.cc
copy to src/default-platform.cc
index fc0ecb499594f06731abe87b29ab6df7f7f82ca0..ef3c4ebd450bbc63ae99b4534a22fa5bd67a2f39 100644
--- a/src/a64/frames-a64.cc
+++ b/src/default-platform.cc
@@ -27,25 +27,30 @@
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_A64
-
-#include "assembler.h"
-#include "assembler-a64.h"
-#include "assembler-a64-inl.h"
-#include "frames.h"
+#include "default-platform.h"
 
 namespace v8 {
 namespace internal {
 
 
-Register JavaScriptFrame::fp_register() { return v8::internal::fp; }
-Register JavaScriptFrame::context_register() { return cp; }
+DefaultPlatform::DefaultPlatform() {}
 
 
-Register StubFailureTrampolineFrame::fp_register() { return v8::internal::fp; }
-Register StubFailureTrampolineFrame::context_register() { return cp; }
+DefaultPlatform::~DefaultPlatform() {}
 
+void DefaultPlatform::CallOnBackgroundThread(Task *task,
+                                             ExpectedRuntime expected_runtime) {
+  // TODO(jochen): implement.
+  task->Run();
+  delete task;
+}
 
-} }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_A64
+void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) {
+  // TODO(jochen): implement.
+  task->Run();
+  delete task;
+}
+
+
+} }  // namespace v8::internal