[chrome.displaySource] Add AVC Video profile and level enumerations.

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

Index: extensions/renderer/api/display_source/wifi_display/wifi_display_elementary_stream_descriptor.h
diff --git a/extensions/renderer/api/display_source/wifi_display/wifi_display_elementary_stream_descriptor.h b/extensions/renderer/api/display_source/wifi_display/wifi_display_elementary_stream_descriptor.h
index c149af851f81ac557e0168f576ccde5efb8f1cc8..204a9e41c3be6e8482dd94b1e70473177f8ea3c3 100644
--- a/extensions/renderer/api/display_source/wifi_display/wifi_display_elementary_stream_descriptor.h
+++ b/extensions/renderer/api/display_source/wifi_display/wifi_display_elementary_stream_descriptor.h
@@ -57,13 +57,25 @@ class WiFiDisplayElementaryStreamDescriptor {
   // AVC (Advanced Video Coding) video descriptor provides basic coding
   // parameters for a video stream.
   struct AVCVideo {
+    enum Level : uint8_t {
+      LEVEL_3_1 = 31u,
+      LEVEL_3_2 = 32u,
+      LEVEL_4 = 40u,
+      LEVEL_4_1 = 41u,
+      LEVEL_4_2 = 42u
+    };
+    enum Profile : uint8_t {
+      PROFILE_BASELINE = 66u,
+      PROFILE_MAIN = 77u,
+      PROFILE_HIGH = 100u
+    };
     static WiFiDisplayElementaryStreamDescriptor Create(
-        uint8_t profile_idc,
+        Profile profile_idc,
         bool constraint_set0_flag,
         bool constraint_set1_flag,
         bool constraint_set2_flag,
         uint8_t avc_compatible_flags,
-        uint8_t level_idc,
+        Level level_idc,
         bool avc_still_present);
   };