[chrome.displaySource][WiFi Display] Consider video encoder capabilities

extensions/renderer/api/display_source/wifi_display/wifi_display_video_encoder.h

 // Copyright 2016 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 EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_
 #define EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_
 
 #include <vector>
 
 #include "base/memory/shared_memory.h"
@@ skipping 34 matching lines @@
     gfx::Size frame_size;
     int frame_rate;
     int bit_rate;
     wds::H264Profile profile;
     wds::H264Level level;
     // Video Encode Accelerator (VEA) specific parameters.
     CreateEncodeMemoryCallback create_memory_callback;
     CreateVideoEncodeAcceleratorCallback vea_create_callback;
   };
 
+  // Returns the list of supported video encoder profiles
+  // for the given frame size and frame rate.
+  // If hight profile is supported it is to be first in the list.
+  static std::vector<wds::H264Profile> FindSupportedProfiles(
+      const gfx::Size& frame_size,
+      int32_t frame_rate);
+
   // A factory method that creates a new encoder instance from the given
   // |params|, the encoder instance is returned as an argument of
   // |result_callback| ('nullptr' argument means encoder creation failure).
   static void Create(const InitParameters& params,
                      const VideoEncoderCallback& encoder_callback);
 
   // WiFiDisplayMediaEncoder
   WiFiDisplayElementaryStreamInfo CreateElementaryStreamInfo() const final;
 
   // Encodes the given raw frame. The resulting encoded frame is passed
@@ skipping 30 matching lines @@
       bool send_idr) = 0;
 
   std::vector<WiFiDisplayElementaryStreamDescriptor> descriptors_;
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
   bool send_idr_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_