Add GL strings to CastSysInfo interface and use to configure GPU

chromecast/public/cast_sys_info.h

 // Copyright 2015 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 CHROMECAST_PUBLIC_CAST_SYS_INFO_H_
 #define CHROMECAST_PUBLIC_CAST_SYS_INFO_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 37 matching lines @@
   virtual std::string GetSystemBuildNumber() = 0;
 
   // Returns default country and locale baked from the factory.
   virtual std::string GetFactoryCountry() = 0;
   virtual std::string GetFactoryLocale(std::string* second_locale) = 0;
 
   // Returns the name of the wifi interface used to connect to the internet.
   virtual std::string GetWifiInterface() = 0;
   // Returns the name of the software AP interface.
   virtual std::string GetApInterface() = 0;
+
+  // Returns the GL_VENDOR string of GPU driver. Must match the value that would
+  // be obtained from a GL context, but implementations must *not* create a GL
+  // context.
+  virtual std::string GetGlVendor() = 0;
+  // Returns the GL_RENDERER string of GPU driver. Must match the value that
+  // would be obtained from a GL context, but implementations must *not* create
+  // a GL context.
+  virtual std::string GetGlRenderer() = 0;
+  // Returns the GL_VERSION string of GPU driver. Must match the value that
+  // would be obtained from a GL context, but implementations must *not* create
+  // a GL context.
+  virtual std::string GetGlVersion() = 0;
 };
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_PUBLIC_CAST_SYS_INFO_H_