Make the size of menulists on Linux the same size as on Windows.

ui/gfx/native_theme_linux.cc

Index: ui/gfx/native_theme_linux.cc
diff --git a/ui/gfx/native_theme_linux.cc b/ui/gfx/native_theme_linux.cc
index 766b003db3049436b099dd6c2c347c441733e7e0..92a3f5b8fdcff3da75f35da977ef524795b55060 100644
--- a/ui/gfx/native_theme_linux.cc
+++ b/ui/gfx/native_theme_linux.cc
@@ -475,12 +475,14 @@ void NativeThemeLinux::PaintButton(skia::PlatformCanvas* canvas,
     return;
   }
 
-  const int kBorderAlpha = state == kHovered ? 0x80 : 0x55;
-  paint.setARGB(kBorderAlpha, 0, 0, 0);
-  canvas->drawLine(rect.x() + 1, rect.y(), kRight - 1, rect.y(), paint);
-  canvas->drawLine(kRight - 1, rect.y() + 1, kRight - 1, kBottom - 1, paint);
-  canvas->drawLine(rect.x() + 1, kBottom - 1, kRight - 1, kBottom - 1, paint);
-  canvas->drawLine(rect.x(), rect.y() + 1, rect.x(), kBottom - 1, paint);
+  if (button.has_border) {
+    const int kBorderAlpha = state == kHovered ? 0x80 : 0x55;
+    paint.setARGB(kBorderAlpha, 0, 0, 0);
+    canvas->drawLine(rect.x() + 1, rect.y(), kRight - 1, rect.y(), paint);
+    canvas->drawLine(kRight - 1, rect.y() + 1, kRight - 1, kBottom - 1, paint);
+    canvas->drawLine(rect.x() + 1, kBottom - 1, kRight - 1, kBottom - 1, paint);
+    canvas->drawLine(rect.x(), rect.y() + 1, rect.x(), kBottom - 1, paint);
+  }
 
   paint.setColor(SK_ColorBLACK);
   const int kLightEnd = state == kPressed ? 1 : 0;
@@ -607,6 +609,7 @@ void NativeThemeLinux::PaintMenuList(skia::PlatformCanvas* canvas,
                                      const MenuListExtraParams& menu_list) {
   ButtonExtraParams button = { 0 };
   button.background_color = menu_list.background_color;
+  button.has_border = menu_list.has_border;
   PaintButton(canvas, state, rect, button);
 
   SkPaint paint;