[Extension Bindings] Add JS custom hook support

extensions/renderer/api_binding.cc

Index: extensions/renderer/api_binding.cc
diff --git a/extensions/renderer/api_binding.cc b/extensions/renderer/api_binding.cc
index 2f585a0f6bb291223cec129a1a38c375ea57156d..a1351b833c4d48355178f0fffdcb1c6070e664b2 100644
--- a/extensions/renderer/api_binding.cc
+++ b/extensions/renderer/api_binding.cc
@@ -290,6 +290,9 @@ v8::Local<v8::Object> APIBinding::CreateInstance(
     DCHECK(success.FromJust());
   }
 
+  if (binding_hooks_)
+    binding_hooks_->InitializeInContext(context, api_name_);
+
   return object;
 }
 
@@ -300,10 +303,14 @@ void APIBinding::HandleCall(const std::string& name,
   v8::Isolate* isolate = arguments->isolate();
   v8::HandleScope handle_scope(isolate);
 
+  // Since this is called synchronously from the JS entry point,
+  // GetCurrentContext() should always be correct.
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+
   if (binding_hooks_) {
     // Check for a custom hook to handle the method.
     APIBindingHooks::HandleRequestHook handler =
-        binding_hooks_->GetHandleRequest(name);
+        binding_hooks_->GetHandleRequest(api_name_, name, context);
     if (!handler.is_null()) {
       handler.Run(signature, arguments);
       return;
@@ -327,10 +334,8 @@ void APIBinding::HandleCall(const std::string& name,
     return;
   }
 
-  // Since this is called synchronously from the JS entry point,
-  // GetCurrentContext() should always be correct.
   method_callback_.Run(name, std::move(parsed_arguments), isolate,
-                       isolate->GetCurrentContext(), callback);
+                       context, callback);
 }
 
 }  // namespace extensions