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

third_party/WebKit/Source/web/WebSettingsImpl.cpp

Index: third_party/WebKit/Source/web/WebSettingsImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSettingsImpl.cpp b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
index 48f492343ec636a337bcafa7ea3e8caeb4b791db..ce73920dba8977cff42628b1b655ba9c0fffc279 100644
--- a/third_party/WebKit/Source/web/WebSettingsImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
@@ -492,11 +492,6 @@ void WebSettingsImpl::setExperimentalWebGLEnabled(bool enabled)
     m_settings->setWebGLEnabled(enabled);
 }
 
-void WebSettingsImpl::setOpenGLMultisamplingEnabled(bool enabled)
-{
-    m_settings->setOpenGLMultisamplingEnabled(enabled);
-}
-
 void WebSettingsImpl::setRenderVSyncNotificationEnabled(bool enabled)
 {
     m_renderVSyncNotificationEnabled = enabled;