Revert of gpu: Add CHROMIUM_sync_query extension.

gpu/command_buffer/service/feature_info.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 GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <set>
 #include <string>
 #include "base/containers/hash_tables.h"
@@ skipping 13 matching lines @@
 
 // FeatureInfo records the features that are available for a ContextGroup.
 class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
  public:
   struct FeatureFlags {
     FeatureFlags();
 
     bool chromium_color_buffer_float_rgba;
     bool chromium_color_buffer_float_rgb;
     bool chromium_framebuffer_multisample;
-    bool chromium_sync_query;
     // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
     // GL_EXT_framebuffer_multisample-style semantics, since they are exposed
     // as core GL functions on this implementation.
     bool use_core_framebuffer_multisample;
     bool multisampled_render_to_texture;
     // Use the IMG GLenum values and functions rather than EXT.
     bool use_img_for_multisampled_render_to_texture;
     bool oes_standard_derivatives;
     bool oes_egl_image_external;
     bool oes_depth24;
@@ skipping 93 matching lines @@
   // Flags for Workarounds.
   Workarounds workarounds_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_