FeatureInfo: Remove allowed_extensions and init workarounds early

content/common/gpu/gpu_command_buffer_stub.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.
 
 #ifndef CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 52 matching lines @@
       LatencyInfoCallback;
 
   GpuCommandBufferStub(
       GpuChannel* channel,
       GpuCommandBufferStub* share_group,
       const gfx::GLSurfaceHandle& handle,
       gpu::gles2::MailboxManager* mailbox_manager,
       gpu::gles2::ImageManager* image_manager,
       const gfx::Size& size,
       const gpu::gles2::DisallowedFeatures& disallowed_features,
-      const std::string& allowed_extensions,
       const std::vector<int32>& attribs,
       gfx::GpuPreference gpu_preference,
       bool use_virtualized_gl_context,
       int32 route_id,
       int32 surface_id,
       GpuWatchdog* watchdog,
       bool software,
       const GURL& active_url);
 
   virtual ~GpuCommandBufferStub();
@@ skipping 123 matching lines @@
   // GpuChannels destroy all the GpuCommandBufferStubs that they own when they
   // are destroyed. So a raw pointer is safe.
   GpuChannel* channel_;
 
   // The group of contexts that share namespaces with this context.
   scoped_refptr<gpu::gles2::ContextGroup> context_group_;
 
   gfx::GLSurfaceHandle handle_;
   gfx::Size initial_size_;
   gpu::gles2::DisallowedFeatures disallowed_features_;
-  std::string allowed_extensions_;
   std::vector<int32> requested_attribs_;
   gfx::GpuPreference gpu_preference_;
   bool use_virtualized_gl_context_;
   int32 route_id_;
   int32 surface_id_;
   bool software_;
   uint32 last_flush_count_;
 
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder_;
@@ skipping 26 matching lines @@
   size_t active_url_hash_;
 
   size_t total_gpu_memory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_