Implement SharedArrayBuffer

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 192e342d9b85f442f5ed879d8aef5a88eeaf84ba..4c29c16b4988c6cfd1c35a6fccb70da21616719d 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -633,7 +633,7 @@ namespace internal {
 
 
 #define FOR_EACH_INTRINSIC_TYPEDARRAY(F)     \
-  F(ArrayBufferInitialize, 2, 1)             \
+  F(ArrayBufferInitialize, 3, 1)             \
   F(ArrayBufferGetByteLength, 1, 1)          \
   F(ArrayBufferSliceImpl, 3, 1)              \
   F(ArrayBufferIsView, 1, 1)                 \
@@ -815,12 +815,14 @@ class Runtime : public AllStatic {
   static void SetupArrayBuffer(Isolate* isolate,
                                Handle<JSArrayBuffer> array_buffer,
                                bool is_external, void* data,
-                               size_t allocated_length);
+                               size_t allocated_length,
+                               SharedFlag shared = NOT_SHARED);
 
   static bool SetupArrayBufferAllocatingData(Isolate* isolate,
                                              Handle<JSArrayBuffer> array_buffer,
                                              size_t allocated_length,
-                                             bool initialize = true);
+                                             bool initialize = true,
+                                             SharedFlag shared = NOT_SHARED);
 
   static void NeuterArrayBuffer(Handle<JSArrayBuffer> array_buffer);