Implement debug marker entry points in the passthrough command buffer.

gpu/command_buffer/service/feature_info.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 "gpu/command_buffer/service/feature_info.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 1342 matching lines @@
   feature_flags_.angle_webgl_compatibility =
       extensions.Contains("GL_ANGLE_webgl_compatibility");
   feature_flags_.chromium_copy_texture =
       extensions.Contains("GL_CHROMIUM_copy_texture");
   feature_flags_.chromium_copy_compressed_texture =
       extensions.Contains("GL_CHROMIUM_copy_compressed_texture");
   feature_flags_.angle_client_arrays =
       extensions.Contains("GL_ANGLE_client_arrays");
   feature_flags_.angle_request_extension =
       extensions.Contains("GL_ANGLE_request_extension");
+  feature_flags_.ext_debug_marker = extensions.Contains("GL_EXT_debug_marker");
 }
 
 void FeatureInfo::InitializeFloatAndHalfFloatFeatures(
     const StringSet& extensions) {
   // Check if we should allow GL_OES_texture_float, GL_OES_texture_half_float,
   // GL_OES_texture_float_linear, GL_OES_texture_half_float_linear
   bool enable_texture_float = false;
   bool enable_texture_float_linear = false;
   bool enable_texture_half_float = false;
   bool enable_texture_half_float_linear = false;
@@ skipping 309 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu