[PresentationAPI] Implements send API for Blob data from WebPresentationClient

content/common/presentation/presentation_service.mojom

Index: content/common/presentation/presentation_service.mojom
diff --git a/content/common/presentation/presentation_service.mojom b/content/common/presentation/presentation_service.mojom
index bc06725ceca237b3c4bf22c88fb3f3e3ad73a305..1f50d6e9f38eac37b97e68646e8297f73dd2efb2 100644
--- a/content/common/presentation/presentation_service.mojom
+++ b/content/common/presentation/presentation_service.mojom
@@ -29,6 +29,7 @@ struct PresentationError {
 enum PresentationMessageType {
   TEXT,
   ARRAY_BUFFER,
+  BLOB,
 };
 
 struct SessionMessage {
@@ -36,6 +37,7 @@ struct SessionMessage {
   string presentation_id;
   PresentationMessageType type;
   string? message;
+  // Used for both ArrayBuffer and Blob data.
   array<uint8>? data;
 };