Disable BGRA support on linux.

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 <set>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 509 matching lines @@
     enable_texture_format_bgra8888 = true;
   }
 
   // Only desktop GL extension GL_EXT_bgra or ANGLE guarantee that we can
   // allocate a renderbuffer with this format.
   if (extensions.Contains("GL_EXT_bgra") || gl_version_info_->is_angle) {
     enable_render_buffer_bgra = true;
   }
 
   if (extensions.Contains("GL_EXT_read_format_bgra") ||
-      extensions.Contains("GL_EXT_bgra")) {
+      extensions.Contains("GL_EXT_bgra") ||
+      workarounds_.support_bgra_color_read_format) {
     enable_read_format_bgra = true;
   }
 
   if (enable_texture_format_bgra8888) {
     feature_flags_.ext_texture_format_bgra8888 = true;
     AddExtensionString("GL_EXT_texture_format_BGRA8888");
     texture_format_validators_[GL_BGRA_EXT].AddValue(GL_UNSIGNED_BYTE);
     validators_.texture_internal_format.AddValue(GL_BGRA_EXT);
     validators_.texture_format.AddValue(GL_BGRA_EXT);
   }
@@ skipping 591 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu