Remove the MSAA WebSetting, which is not read or used.

third_party/WebKit/Source/core/frame/Settings.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 40 matching lines @@
     ;
 }
 
 #if OS(WIN)
 static const bool defaultSelectTrailingWhitespaceEnabled = true;
 #else
 static const bool defaultSelectTrailingWhitespaceEnabled = false;
 #endif
 
 Settings::Settings()
-    : m_openGLMultisamplingEnabled(false)
+    :
 #if DEBUG_TEXT_AUTOSIZING_ON_DESKTOP
     , m_textAutosizingWindowSizeOverride(320, 480)

[piman, 2016/04/02 00:47:40]

:, is unlikely to work...

[danakj, 2016/04/02 00:57:05]

oops, rekt. preprocessor ftl

     , m_textAutosizingEnabled(true)
 #else
     , m_textAutosizingEnabled(false)
 #endif
     SETTINGS_INITIALIZER_LIST
 {
 }
 
 PassOwnPtr<Settings> Settings::create()
 {
@@ skipping 35 matching lines @@
 void Settings::setMockScrollbarsEnabled(bool flag)
 {
     ScrollbarTheme::setMockScrollbarsEnabled(flag);
 }
 
 bool Settings::mockScrollbarsEnabled()
 {
     return ScrollbarTheme::mockScrollbarsEnabled();
 }
 
-void Settings::setOpenGLMultisamplingEnabled(bool flag)
-{
-    if (m_openGLMultisamplingEnabled == flag)
-        return;
-
-    m_openGLMultisamplingEnabled = flag;
-    invalidate(SettingsDelegate::MultisamplingChange);
-}
-
 } // namespace blink