fix: ensure tray icon is the proper size on linux (#21904)

* fix: ensure tray icon is the proper size on linux

Fixes #21445.

* chore: use correct include order

* chore: use correct include order

* chore: remove use of deprecated casting style

* chore: be more explicit about the 22 pixel height

* chore: remove now-unneeded #include statements

* chore: fix typo and bugs.chromium.org link

* refactor: put GetIconFromImage() in anon namespace

shell/browser/ui/tray_icon_gtk.cc

@@ -10,15 +10,41 @@
 #include "shell/browser/browser.h"
 #include "shell/common/application_info.h"
 #include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_skia_operations.h"
 
 namespace electron {
 
+namespace {
+
+gfx::ImageSkia GetIconFromImage(const gfx::Image& image) {
+  auto icon = image.AsImageSkia();
+  auto size = icon.size();
+
+  // Systray icons are historically 22 pixels tall, e.g. on Ubuntu GNOME,
+  // KDE, and xfce. Taller icons are causing incorrect sizing issues -- e.g.
+  // a 1x1 icon -- so for now, pin the height manually. Similar behavior to
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=1042098 ?
+  static constexpr int DESIRED_HEIGHT = 22;
+  if ((size.height() != 0) && (size.height() != DESIRED_HEIGHT)) {
+    const double ratio = DESIRED_HEIGHT / static_cast<double>(size.height());
+    size = gfx::Size(static_cast<int>(ratio * size.width()),
+                     static_cast<int>(ratio * size.height()));
+    icon = gfx::ImageSkiaOperations::CreateResizedImage(
+        icon, skia::ImageOperations::RESIZE_BEST, size);
+  }
+
+  return icon;
+}
+
+}  // namespace
+
 TrayIconGtk::TrayIconGtk() = default;
 
 TrayIconGtk::~TrayIconGtk() = default;
 
 void TrayIconGtk::SetImage(const gfx::Image& image) {
-  image_ = image.AsImageSkia();
+  image_ = GetIconFromImage(image);
+
   if (icon_) {
     icon_->SetIcon(image_);
     return;