Give user ability to file a feedback report from the display error notification.

ui/display/util/x11/edid_parser_x11.h

 // Copyright 2014 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 UI_DISPLAY_UTIL_X11_EDID_PARSER_X11_H_
 #define UI_DISPLAY_UTIL_X11_EDID_PARSER_X11_H_
 
 #include <stdint.h>
 
 #include <string>
+#include <vector>
 
+#include "base/macros.h"
 #include "ui/display/types/display_constants.h"
 #include "ui/display/util/display_util_export.h"
 
 typedef unsigned long XID;
 typedef XID RROutput;
 
 // Xrandr utility functions to help get EDID information.
 
 namespace ui {
 
-// Gets the EDID data from |output| and generates the display id through
-// |GetDisplayIdFromEDID|.
-DISPLAY_UTIL_EXPORT bool GetDisplayId(XID output,
-                                      uint8_t index,
-                                      int64_t* display_id_out);
+// Xrandr utility class to help get EDID information.
+class DISPLAY_UTIL_EXPORT EDIDParserX11 {
+ public:
+  EDIDParserX11(XID output_id);
+  ~EDIDParserX11();
 
-// Generate the human readable string from EDID obtained from |output|.
-DISPLAY_UTIL_EXPORT std::string GetDisplayName(RROutput output);
+  // Sets |out_display_id| to the display ID from the EDID of this output.
+  // Returns true if successful, false otherwise.
+  bool GetDisplayId(uint8_t index, int64_t* out_display_id) const;
 
-// Gets the overscan flag from |output| and stores to |flag|. Returns true if
-// the flag is found. Otherwise returns false and doesn't touch |flag|. The
-// output will produce overscan if |flag| is set to true, but the output may
-// still produce overscan even though it returns true and |flag| is set to
-// false.
-DISPLAY_UTIL_EXPORT bool GetOutputOverscanFlag(RROutput output, bool* flag);
+  // Generate the human readable string from EDID obtained from |output|.
+  // Returns an empty string upon error.
+  std::string GetDisplayName() const;
+
+  // Gets the overscan flag and stores to |out_flag|. Returns true if the flag
+  // is found. Otherwise returns false and doesn't touch |out_flag|. The output
+  // will produce overscan if |out_flag| is set to true, but the output may
+  // still produce overscan even though it returns true and |out_flag| is set to
+  // false.
+  bool GetOutputOverscanFlag(bool* out_flag) const;
+
+  XID output_id() const { return output_id_; }
+  const std::vector<uint8_t>& edid() const { return edid_; }
+
+ private:
+  XID output_id_;
+
+  // This will be an empty vector upon failure to get the EDID from the
+  // |output_id_|.
+  std::vector<uint8_t> edid_;
+
+  DISALLOW_COPY_AND_ASSIGN(EDIDParserX11);
+};
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_UTIL_X11_EDID_PARSER_X11_H_