Hook ANGLE_request_extension up to the passthrough cmd decoder.

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 1438 matching lines @@
       extensions.Contains("GL_ANGLE_robust_client_memory");
 
   feature_flags_.khr_debug = gl_version_info_->IsAtLeastGL(4, 3) ||
                              gl_version_info_->IsAtLeastGLES(3, 2) ||
                              extensions.Contains("GL_KHR_debug");
 
   feature_flags_.chromium_bind_generates_resource =
       extensions.Contains("GL_CHROMIUM_bind_generates_resource");
   feature_flags_.angle_webgl_compatibility =
       extensions.Contains("GL_ANGLE_webgl_compatibility");
+  feature_flags_.angle_request_extension =
+      extensions.Contains("GL_ANGLE_request_extension");
 }
 
 bool FeatureInfo::IsES3Capable() const {
   if (workarounds_.disable_texture_storage)
     return false;
   if (gl_version_info_)
     return gl_version_info_->is_es3_capable;
   return false;
 }
 
@@ skipping 123 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu