Display GL window system binding information in about:gpu

ui/gl/gl_implementation.h

Index: ui/gl/gl_implementation.h
diff --git a/ui/gl/gl_implementation.h b/ui/gl/gl_implementation.h
index b3f8ff1224395da62b61a7c12b1f51a08c935c30..8fcee879b67588e00cc41945318652c192c52458 100644
--- a/ui/gl/gl_implementation.h
+++ b/ui/gl/gl_implementation.h
@@ -27,6 +27,12 @@ enum GLImplementation {
   kGLImplementationMockGL
 };
 
+struct GLWindowSystemBindingInfo {
+  std::string vendor;
+  std::string version;
+  std::string extensions;
+};
+
 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls);
 
 #if defined(OS_WIN)
@@ -80,6 +86,10 @@ void* GetGLCoreProcAddress(const char* name);
 // Find an entry point in the current GL implementation.
 void* GetGLProcAddress(const char* name);
 
+// Return information about the GL window system binding implementation (e.g.,
+// EGL, GLX, WGL). Returns true if the information was retrieved successfully.
+GL_EXPORT bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info);
+
 }  // namespace gfx
 
 #endif  // UI_GL_GL_IMPLEMENTATION_H_