Attaching an image to many color attachment points is unsupported

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 <memory>
 #include <string>
 
@@ skipping 92 matching lines @@
   // Constructor with workarounds taken from |command_line|.
   FeatureInfo(const base::CommandLine& command_line,
               const GpuDriverBugWorkarounds& gpu_driver_bug_workarounds);
 
   // Initializes the feature information. Needs a current GL context.
   bool Initialize(ContextType context_type,
                   const DisallowedFeatures& disallowed_features);
 
   // Helper that defaults to no disallowed features and a GLES2 context.
   bool InitializeForTesting();
+  // Helper that defaults to no disallowed Features.
+  bool InitializeForTesting(ContextType context_type);
   // Helper that defaults to a GLES2 context.
   bool InitializeForTesting(const DisallowedFeatures& disallowed_features);
 
   const Validators* validators() const {
     return &validators_;
   }
 
   ContextType context_type() const { return context_type_; }
 
   const std::string& extensions() const {
@@ skipping 71 matching lines @@
   bool disable_shader_translator_;
   std::unique_ptr<gl::GLVersionInfo> gl_version_info_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_