Proxy PPB_ArrayBuffer_Dev, make them work over Messaging

ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc b/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc
index 5167dce5de9816c600567ae512b2535075d8ed25..ec3c9ca24e7abe51cec41f416b58ac651cae22ed 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/browser_globals.cc
@@ -311,6 +311,13 @@ const PPB_Var* PPBVarInterface() {
   return ppb;
 }
 
+const PPB_VarArrayBuffer_Dev* PPBVarArrayBufferInterface() {
+  static const PPB_VarArrayBuffer_Dev* ppb =
+      static_cast<const PPB_VarArrayBuffer_Dev*>(
+          GetBrowserInterfaceSafe(PPB_VAR_ARRAY_BUFFER_DEV_INTERFACE));
+  return ppb;
+}
+
 const PPB_WheelInputEvent* PPBWheelInputEventInterface() {
   static const PPB_WheelInputEvent* ppb =
       static_cast<const PPB_WheelInputEvent*>(