Remove GPU_FEATURE_TYPE_3D_CSS and --disable-accelerated-layers

content/renderer/pepper/ppb_graphics_3d_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/pepper/ppb_graphics_3d_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 194 matching lines @@
       HostGlobals::Get()->GetInstance(pp_instance());
   if (!plugin_instance)
     return false;
 
   const WebPreferences& prefs =
       static_cast<RenderViewImpl*>(plugin_instance->GetRenderView())
           ->webkit_preferences();
   // 3D access might be disabled or blacklisted.
   if (!prefs.pepper_3d_enabled)
     return false;
-  // If accelerated compositing of plugins is disabled, fail to create a 3D
-  // context, because it won't be visible. This allows graceful fallback in the
-  // modules.
-  if (!prefs.accelerated_compositing_for_plugins_enabled)
-    return false;
 
   platform_context_.reset(new PlatformContext3D);
   if (!platform_context_)
     return false;
 
   PlatformContext3D* share_platform_context = NULL;
   if (share_context) {
     PPB_Graphics3D_Impl* share_graphics =
         static_cast<PPB_Graphics3D_Impl*>(share_context);
     share_platform_context = share_graphics->platform_context();
@@ skipping 68 matching lines @@
       instance->module()->GetPluginInterface(PPP_GRAPHICS_3D_INTERFACE));
   // We have to check *again* that the instance exists, because it could have
   // been deleted during GetPluginInterface(). Even the PluginModule could be
   // deleted, but in that case, the instance should also be gone, so the
   // GetInstance check covers both cases.
   if (ppp_graphics_3d && HostGlobals::Get()->GetInstance(this_pp_instance))
     ppp_graphics_3d->Graphics3DContextLost(this_pp_instance);
 }
 
 }  // namespace content