FeatureInfo: Remove allowed_extensions and init workarounds early

content/common/gpu/gpu_messages.h

 // 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <string>
 #include <vector>
 
@@ skipping 22 matching lines @@
 #include "ui/gl/gpu_preference.h"
 
 #if defined(OS_ANDROID)
 #include "content/common/android/surface_texture_peer.h"
 #endif
 
 #define IPC_MESSAGE_START GpuMsgStart
 
 IPC_STRUCT_BEGIN(GPUCreateCommandBufferConfig)
   IPC_STRUCT_MEMBER(int32, share_group_id)
-  IPC_STRUCT_MEMBER(std::string, allowed_extensions)
   IPC_STRUCT_MEMBER(std::vector<int>, attribs)
   IPC_STRUCT_MEMBER(GURL, active_url)
   IPC_STRUCT_MEMBER(gfx::GpuPreference, gpu_preference)
 IPC_STRUCT_END()
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params)
   IPC_STRUCT_MEMBER(int32, surface_id)
   IPC_STRUCT_MEMBER(uint64, surface_handle)
@@ skipping 748 matching lines @@
                     gfx::Size /* buffer_size */,
                     gfx::Rect /* visible_rect */)
 
 // Report successful copy of a capture of a surface.
 IPC_MESSAGE_ROUTED1(SurfaceCapturerHostMsg_NotifyCopyCaptureDone,
                     int32 /* frame_id */)
 
 // Report error.
 IPC_MESSAGE_ROUTED1(SurfaceCapturerHostMsg_NotifyError,
                     content::SurfaceCapturer::Error /* error */)