Disable WEBGL_compressed_texture_etc1 on WebGL 1 on ANGLE

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 1006 matching lines @@
   }
 
   if (feature_flags_.oes_egl_image_external ||
       feature_flags_.nv_egl_stream_consumer_external) {
     validators_.texture_bind_target.AddValue(GL_TEXTURE_EXTERNAL_OES);
     validators_.get_tex_param_target.AddValue(GL_TEXTURE_EXTERNAL_OES);
     validators_.texture_parameter.AddValue(GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES);
     validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_EXTERNAL_OES);
   }
 
-  if (extensions.Contains("GL_OES_compressed_ETC1_RGB8_texture")) {
+  // TODO(kainino): If we add a way to query whether ANGLE is exposing
+  // native support for ETC1 textures, require that here. Otherwise, we could
+  // co-opt the native-ETC2-support query discussed below.
+  if (extensions.Contains("GL_OES_compressed_ETC1_RGB8_texture") &&
+      !gl_version_info_->is_angle) {
     AddExtensionString("GL_OES_compressed_ETC1_RGB8_texture");
     feature_flags_.oes_compressed_etc1_rgb8_texture = true;
     validators_.compressed_texture_format.AddValue(GL_ETC1_RGB8_OES);
     validators_.texture_internal_format_storage.AddValue(GL_ETC1_RGB8_OES);
   }
 
   // TODO(kainino): Once we have a way to query whether ANGLE is exposing
   // native support for ETC2 textures, require that here.
   if (gl_version_info_->is_es3 && !gl_version_info_->is_angle) {
     AddExtensionString("GL_CHROMIUM_compressed_texture_etc");
@@ skipping 532 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu