Revert of Linux Aura: get tooltip background color from theme

chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/libgtk2ui/native_theme_gtk2.h"
 
 #include <gtk/gtk.h>
 
 #include "chrome/browser/ui/libgtk2ui/chrome_gtk_menu_subclasses.h"
 #include "chrome/browser/ui/libgtk2ui/skia_utils_gtk2.h"
@@ skipping 227 matching lines @@
       return GetEntryStyle()->base[GTK_STATE_NORMAL];
     case kColorId_TextfieldReadOnlyColor:
       return GetEntryStyle()->text[GTK_STATE_INSENSITIVE];
     case kColorId_TextfieldReadOnlyBackground:
       return GetEntryStyle()->base[GTK_STATE_INSENSITIVE];
     case kColorId_TextfieldSelectionColor:
       return GetEntryStyle()->text[GTK_STATE_SELECTED];
     case kColorId_TextfieldSelectionBackgroundFocused:
       return GetEntryStyle()->base[GTK_STATE_SELECTED];
 
-    // Tooltips
-    case kColorId_TooltipBackground:
-      return GetWindowStyle()->bg[GTK_STATE_NORMAL];
-
-    // Trees and Tables (implemented on GTK using the same class)
+      // Trees and Tables (implemented on GTK using the same class)
     case kColorId_TableBackground:
     case kColorId_TreeBackground:
       return GetTreeStyle()->bg[GTK_STATE_NORMAL];
     case kColorId_TableText:
     case kColorId_TreeText:
       return GetTreeStyle()->text[GTK_STATE_NORMAL];
     case kColorId_TableSelectedText:
     case kColorId_TableSelectedTextUnfocused:
     case kColorId_TreeSelectedText:
     case kColorId_TreeSelectedTextUnfocused:
@@ skipping 54 matching lines @@
     case kColorId_ResultsTableHoveredDivider: {
       GtkStyle* win_style = GetWindowStyle();
       return GdkAlphaBlend(win_style->text[GTK_STATE_PRELIGHT],
                            win_style->bg[GTK_STATE_PRELIGHT], 0x34);
     }
     case kColorId_ResultsTableSelectedDivider: {
       GtkStyle* win_style = GetWindowStyle();
       return GdkAlphaBlend(win_style->text[GTK_STATE_SELECTED],
                            win_style->bg[GTK_STATE_SELECTED], 0x34);
     }
+    default:
+      // Fall through
+      break;
   }
 
   return SkColorToGdkColor(kInvalidColorIdColor);
 }
 
 GtkWidget* NativeThemeGtk2::GetRealizedWindow() const {
   if (!fake_window_) {
     fake_window_ = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     gtk_widget_realize(fake_window_);
   }
@@ skipping 50 matching lines @@
       fake_menu_.Own(gtk_custom_menu_new());
 
     fake_menu_item_ = gtk_custom_menu_item_new();
     gtk_menu_shell_append(GTK_MENU_SHELL(fake_menu_.get()), fake_menu_item_);
   }
 
   return gtk_rc_get_style(fake_menu_item_);
 }
 
 }  // namespace libgtk2ui