[wasm] response-based compile APIs

third_party/WebKit/Source/modules/fetch/Response.h

Index: third_party/WebKit/Source/modules/fetch/Response.h
diff --git a/third_party/WebKit/Source/modules/fetch/Response.h b/third_party/WebKit/Source/modules/fetch/Response.h
index 291c6fb5e5278e948153da1a75130d0eefeb3b03..900d3d9b54e4e2eb99b363913cbf123e83e3011a 100644
--- a/third_party/WebKit/Source/modules/fetch/Response.h
+++ b/third_party/WebKit/Source/modules/fetch/Response.h
@@ -26,7 +26,31 @@ class ScriptState;
 class WebServiceWorkerResponse;
 
 class MODULES_EXPORT Response final : public Body {
-  DEFINE_WRAPPERTYPEINFO();
+ public:
+  const WrapperTypeInfo* wrapperTypeInfo() const override {
+    return &s_wrapperTypeInfoOverride;
+  }
+
+ private:
+  // We want to overload in blink V8-provided APIs - namely, WebAssembly.compile
+  // and WebAssembly.instantiate. Refer to:
+  // https://github.com/WebAssembly/design/blob/master/Web.md#additional-web-embedding-api
+  //
+  // The overloads need to be implemented blink-side because they work with web
+  // APIs (Response). To achieve this, we use purposefully-built injection
+  // points exposed by V8 and initialize them when the Response APIs are
+  // initialized. At the moment, this requires working around the generated
+  // code: we redefine the WrapperTypeInfo and insert the installerOveride,
+  // which injects the overloads and then continues with the usual
+  // initialization.
+  //
+  // https://crbug.com/708238 for tracking.
+  static v8::Local<v8::FunctionTemplate> installerOverride(
+      v8::Isolate*,
+      const DOMWrapperWorld&);
+  static const WrapperTypeInfo& s_wrapperTypeInfo;
+  static const WrapperTypeInfo s_wrapperTypeInfoOverride;
+
   WTF_MAKE_NONCOPYABLE(Response);
 
  public: