Revert of Delete the enable/disable layer squashing flags and settings.

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 983 matching lines @@
   // Disable GL multisampling if requested on command line.
   settings->setOpenGLMultisamplingEnabled(prefs.gl_multisampling_enabled);
 
   // Enable WebGL errors to the JS console if requested.
   settings->setWebGLErrorsToConsoleEnabled(
       prefs.webgl_errors_to_console_enabled);
 
   // Uses the mock theme engine for scrollbars.
   settings->setMockScrollbarsEnabled(prefs.mock_scrollbars_enabled);
 
+  settings->setLayerSquashingEnabled(prefs.layer_squashing_enabled);
+
   // Enable gpu-accelerated 2d canvas if requested on the command line.
   settings->setAccelerated2dCanvasEnabled(prefs.accelerated_2d_canvas_enabled);
 
   settings->setMinimumAccelerated2dCanvasSize(
       prefs.minimum_accelerated_2d_canvas_size);
 
   // Disable antialiasing for 2d canvas if requested on the command line.
   settings->setAntialiased2dCanvasEnabled(
       !prefs.antialiased_2d_canvas_disabled);
 
@@ skipping 3192 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content