use a smaller system font for eSystemFont_List on Mac OS X. b=262191 r=smorgan sr=roc

gfx/src/thebes/nsSystemFontsMac.cpp

@@ -142,7 +142,7 @@ nsSystemFontsMac::GetSystemFont(nsSystemFontID aID, nsString *aFontName,
         case eSystemFont_Dialog:        fontID = kThemeSystemFont;         break;
         case eSystemFont_Button:        fontID = kThemePushButtonFont;     break;
         case eSystemFont_PullDownMenu:  fontID = kThemeMenuItemFont;       break;
-        case eSystemFont_List:          fontID = kThemeSystemFont;         break;
+        case eSystemFont_List:          fontID = kThemeSmallSystemFont;    break;
         case eSystemFont_Field:         fontID = kThemeApplicationFont;    break;
         // moz
         case eSystemFont_Tooltips:      fontID = kThemeSmallSystemFont;    break;

widget/src/cocoa/nsNativeThemeCocoa.mm

@@ -875,7 +875,7 @@ nsNativeThemeCocoa::GetWidgetBorder(nsIDeviceContext* aContext,
     case NS_THEME_DROPDOWN_BUTTON:
       // We need to shift the text up a single pixel. For native form control drawing,
       // the borders need not actually reflect the size of the drawn border.
-      aResult->SizeTo(kAquaDropdownLeftBorder, 0, kAquaDropdownRightBorder, 1);
+      aResult->SizeTo(kAquaDropdownLeftBorder, 1, kAquaDropdownRightBorder, 1);
       break;
     
     case NS_THEME_TEXTFIELD: {