Pass arguments instance through the chain in order to throw error

atom/browser/api/atom_api_browser_window.cc

@@ -1082,8 +1082,13 @@ void BrowserWindow::ToggleTabBar() {
   window_->ToggleTabBar();
 }
 
-void BrowserWindow::AddTabbedWindow(NativeWindow* window) {
-  window_->AddTabbedWindow(window);
+void BrowserWindow::AddTabbedWindow(mate::Arguments* args) {
+  NativeWindow* window;
+  if (!args->GetNext(&window)) {
+    args->ThrowError("Insert good error message here");
+    return;
+  }
+  window_->AddTabbedWindow(window, args);
 }
 
 void BrowserWindow::SetVibrancy(mate::Arguments* args) {

atom/browser/api/atom_api_browser_window.h

@@ -243,7 +243,7 @@ class BrowserWindow : public mate::TrackableObject<BrowserWindow>,
   void MergeAllWindows();
   void MoveTabToNewWindow();
   void ToggleTabBar();
-  void AddTabbedWindow(NativeWindow* window);
+  void AddTabbedWindow(mate::Arguments* args);
 
   void SetVibrancy(mate::Arguments* args);
   void SetTouchBar(const std::vector<mate::PersistentDictionary>& items);

atom/browser/native_window.cc

@@ -336,7 +336,7 @@ void NativeWindow::MoveTabToNewWindow() {
 void NativeWindow::ToggleTabBar() {
 }
 
-void NativeWindow::AddTabbedWindow(NativeWindow* window) {
+void NativeWindow::AddTabbedWindow(NativeWindow* window, mate::Arguments* args) {
 }
 
 void NativeWindow::SetVibrancy(const std::string& filename) {

atom/browser/native_window.h

@@ -192,7 +192,7 @@ class NativeWindow : public base::SupportsUserData,
   virtual void MergeAllWindows();
   virtual void MoveTabToNewWindow();
   virtual void ToggleTabBar();
-  virtual void AddTabbedWindow(NativeWindow* window);
+  virtual void AddTabbedWindow(NativeWindow* window, mate::Arguments* args);
 
   // Webview APIs.
   virtual void FocusOnWebView();

atom/browser/native_window_mac.h

@@ -109,7 +109,7 @@ class NativeWindowMac : public NativeWindow {
   void MergeAllWindows() override;
   void MoveTabToNewWindow() override;
   void ToggleTabBar() override;
-  void AddTabbedWindow(NativeWindow* window) override;
+  void AddTabbedWindow(NativeWindow* window, mate::Arguments* args) override;
 
   void SetVibrancy(const std::string& type) override;
   void SetTouchBar(

atom/browser/native_window_mac.mm

@@ -918,6 +918,7 @@ NativeWindowMac::NativeWindowMac(
   }
 
   if (transparent()) {
+    NSLog(@"Setting transparent");
     // Setting the background color to clear will also hide the shadow.
     [window_ setBackgroundColor:[NSColor clearColor]];
   }
@@ -1671,9 +1672,9 @@ void NativeWindowMac::ToggleTabBar() {
   }
 }
 
-void NativeWindowMac::AddTabbedWindow(NativeWindow* window) {
+void NativeWindowMac::AddTabbedWindow(NativeWindow* window, mate::Arguments* args) {
   if (window_.get() == window->GetNativeWindow()) {
-    NSLog(@"Error: AddTabbedWindow cannot be called by a window on itself.");
+    args->ThrowError("AddTabbedWindow cannot be called by a window on itself");
   } else {
     if ([window_ respondsToSelector:@selector(addTabbedWindow:ordered:)]) {
       [window_ addTabbedWindow:window->GetNativeWindow() ordered:NSWindowAbove];