Add "Supports overlays" information to about:gpu.

gpu/config/gpu_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_CONFIG_GPU_INFO_H_
 #define GPU_CONFIG_GPU_INFO_H_
 
 // Provides access to the GPU information for the system
 // on which chrome is currently running.
 
@@ skipping 199 matching lines @@
 
   // Number of GPU process crashes recorded.
   int process_crash_count;
 
   // True if the GPU is running in the browser process instead of its own.
   bool in_process_gpu;
 
   // True if the GPU process is using the passthrough command decoder.
   bool passthrough_cmd_decoder;
 
+  // True if the current set of outputs supports overlays.
+  bool supports_overlays = false;
+
   // The state of whether the basic/context/DxDiagnostics info is collected and
   // if the collection fails or not.
   CollectInfoResult basic_info_state;
   CollectInfoResult context_info_state;
 #if defined(OS_WIN)
   CollectInfoResult dx_diagnostics_info_state;
 
   // The information returned by the DirectX Diagnostics Tool.
   DxDiagNode dx_diagnostics;
 #endif
@@ skipping 51 matching lines @@
     virtual ~Enumerator() {}
   };
 
   // Outputs the fields in this structure to the provided enumerator.
   void EnumerateFields(Enumerator* enumerator) const;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_INFO_H_