[node] Update changes in MapObserver::onDidFailLoadingMap

platform/node/src/node_map.cpp

@@ -42,8 +42,8 @@ static const char* releasedMessage() {
 NodeBackend::NodeBackend()
     : HeadlessBackend(sharedDisplay()) {}
 
-void NodeBackend::onDidFailLoadingMap() {
-    throw std::runtime_error("Requires a map style to be a valid style JSON");
+void NodeBackend::onDidFailLoadingMap(std::exception_ptr error) {
+    std::rethrow_exception(error);
 }
 
 void NodeMap::Init(v8::Local<v8::Object> target) {

platform/node/src/node_map.hpp

@@ -7,6 +7,8 @@
 #include <mbgl/gl/headless_backend.hpp>
 #include <mbgl/gl/offscreen_view.hpp>
 
+#include <exception>
+
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-parameter"
 #pragma GCC diagnostic ignored "-Wshadow"
@@ -18,7 +20,7 @@ namespace node_mbgl {
 class NodeBackend : public mbgl::HeadlessBackend {
 public:
     NodeBackend();
-    void onDidFailLoadingMap() final;
+    void onDidFailLoadingMap(std::exception_ptr) final;
 };
 
 class NodeMap : public Nan::ObjectWrap,

platform/node/test/js/map.test.js

@@ -311,11 +311,11 @@ test('Map', function(t) {
 
             t.throws(function() {
                 map.load('foo bar');
-            }, /Requires a map style to be a valid style JSON/);
+            }, /Failed to parse style: 1 - Invalid value./);
 
             t.throws(function() {
                 map.load('""');
-            }, /Requires a map style to be a valid style JSON/);
+            }, /Failed to parse style: style must be an object/);
 
             map.release();
             t.end();
@@ -335,7 +335,7 @@ test('Map', function(t) {
 
             t.throws(function() {
                 map.load('invalid');
-            }, /Requires a map style to be a valid style JSON/);
+            }, /Failed to parse style: 0 - Invalid value./);
         });
 
         t.test('accepts an empty stylesheet string', function(t) {