Remove frame flattening setting from Chromium.

webkit/glue/webpreferences.cc

Index: webkit/glue/webpreferences.cc
diff --git a/webkit/glue/webpreferences.cc b/webkit/glue/webpreferences.cc
index b07dd0d3945d8e3997b6fd43a4c6c5f7b857cf0e..7082668589aae673983d82beba17a3377be82522 100644
--- a/webkit/glue/webpreferences.cc
+++ b/webkit/glue/webpreferences.cc
@@ -67,7 +67,6 @@ WebPreferences::WebPreferences()
       is_online(true),
       user_style_sheet_enabled(false),
       author_and_user_styles_enabled(true),
-      frame_flattening_enabled(false),
       allow_universal_access_from_file_urls(false),
       allow_file_access_from_file_urls(false),
       webaudio_enabled(false),
@@ -313,8 +312,6 @@ void WebPreferences::Apply(WebView* web_view) const {
   // change this, since it would break existing rich text editors.
   settings->setEditableLinkBehaviorNeverLive();
 
-  settings->setFrameFlatteningEnabled(frame_flattening_enabled);
-
   settings->setFontRenderingModeNormal();
   settings->setJavaEnabled(java_enabled);