Clean up NativeTheme (particularly CommonTheme).

chrome/browser/ui/views/toolbar/app_menu.cc

Index: chrome/browser/ui/views/toolbar/app_menu.cc
diff --git a/chrome/browser/ui/views/toolbar/app_menu.cc b/chrome/browser/ui/views/toolbar/app_menu.cc
index 26839ed476a25d322e51562a9eacdf3091f22452..b7399bbe8c13f0396f108888b6cf5f064a147565 100644
--- a/chrome/browser/ui/views/toolbar/app_menu.cc
+++ b/chrome/browser/ui/views/toolbar/app_menu.cc
@@ -195,14 +195,12 @@ class InMenuButtonBackground : public views::Background {
                                  views::Button::ButtonState state) {
     const ui::NativeTheme* theme = view->GetNativeTheme();
     switch (state) {
-      case views::Button::STATE_HOVERED:
-        // Hovered should be handled in DrawBackground.
-        NOTREACHED();
-        return theme->GetSystemColor(
-            ui::NativeTheme::kColorId_HoverMenuItemBackgroundColor);
       case views::Button::STATE_PRESSED:
         return theme->GetSystemColor(
             ui::NativeTheme::kColorId_FocusedMenuItemBackgroundColor);
+      case views::Button::STATE_HOVERED:
+        // Hovered should be handled in DrawBackground.
+        NOTREACHED();
       default:
         return theme->GetSystemColor(
             ui::NativeTheme::kColorId_MenuBackgroundColor);