fix: Alt+Click should not toggle menu bar (#29451)

Co-authored-by: Cheng Zhao <[email protected]>

shell/browser/native_window_views.cc

@@ -332,12 +332,12 @@ NativeWindowViews::NativeWindowViews(const gin_helper::Dictionary& options,
     last_window_state_ = ui::SHOW_STATE_NORMAL;
 #endif
 
-#if defined(OS_LINUX)
-  // Listen to move events.
+  // Listen to mouse events.
   aura::Window* window = GetNativeWindow();
   if (window)
     window->AddPreTargetHandler(this);
 
+#if defined(OS_LINUX)
   // On linux after the widget is initialized we might have to force set the
   // bounds if the bounds are smaller than the current display
   SetBounds(gfx::Rect(GetPosition(), bounds.size()), false);
@@ -352,11 +352,9 @@ NativeWindowViews::~NativeWindowViews() {
   SetForwardMouseMessages(false);
 #endif
 
-#if defined(OS_LINUX)
   aura::Window* window = GetNativeWindow();
   if (window)
     window->RemovePreTargetHandler(this);
-#endif
 }
 
 void NativeWindowViews::SetGTKDarkThemeEnabled(bool use_dark_theme) {
@@ -1448,11 +1446,9 @@ void NativeWindowViews::OnWidgetBoundsChanged(views::Widget* changed_widget,
 }
 
 void NativeWindowViews::OnWidgetDestroying(views::Widget* widget) {
-#if defined(OS_LINUX)
   aura::Window* window = GetNativeWindow();
   if (window)
     window->RemovePreTargetHandler(this);
-#endif
 }
 
 void NativeWindowViews::OnWidgetDestroyed(views::Widget* changed_widget) {
@@ -1570,17 +1566,20 @@ void NativeWindowViews::HandleKeyboardEvent(
   root_view_->HandleKeyEvent(event);
 }
 
-#if defined(OS_LINUX)
 void NativeWindowViews::OnMouseEvent(ui::MouseEvent* event) {
   if (event->type() != ui::ET_MOUSE_PRESSED)
     return;
 
+  // Alt+Click should not toggle menu bar.
+  root_view_->ResetAltState();
+
+#if defined(OS_LINUX)
   if (event->changed_button_flags() == ui::EF_BACK_MOUSE_BUTTON)
     NotifyWindowExecuteAppCommand(kBrowserBackward);
   else if (event->changed_button_flags() == ui::EF_FORWARD_MOUSE_BUTTON)
     NotifyWindowExecuteAppCommand(kBrowserForward);
-}
 #endif
+}
 
 ui::WindowShowState NativeWindowViews::GetRestoredState() {
   if (IsMaximized())

shell/browser/native_window_views.h

@@ -223,10 +223,8 @@ class NativeWindowViews : public NativeWindow,
       content::WebContents*,
       const content::NativeWebKeyboardEvent& event) override;
 
-#if defined(OS_LINUX)
   // ui::EventHandler:
   void OnMouseEvent(ui::MouseEvent* event) override;
-#endif
 
   // Returns the restore state for the window.
   ui::WindowShowState GetRestoredState();