Implement in-process PPB_VarArrayBuffer_Dev.

ppapi/shared_impl/ppb_var_shared.h

Index: ppapi/shared_impl/ppb_var_shared.h
diff --git a/ppapi/shared_impl/ppb_var_shared.h b/ppapi/shared_impl/ppb_var_shared.h
index dfdf47278406e1fc1b80902d7309f8396fd1df5c..5865d46996e05b6e4fdea79b74894ba34c1796e0 100644
--- a/ppapi/shared_impl/ppb_var_shared.h
+++ b/ppapi/shared_impl/ppb_var_shared.h
@@ -12,6 +12,7 @@
 struct PP_Var;
 struct PPB_Var;
 struct PPB_Var_1_0;
+struct PPB_VarArrayBuffer_Dev;
 
 namespace ppapi {
 
@@ -19,6 +20,7 @@ class PPAPI_SHARED_EXPORT PPB_Var_Shared {
  public:
   static const PPB_Var* GetVarInterface();
   static const PPB_Var_1_0* GetVarInterface1_0();
+  static const PPB_VarArrayBuffer_Dev* GetVarArrayBufferInterface();
 };
 
 }  // namespace ppapi