Motown: New wrapper classes for ffmpeg format context and io context

services/media/framework/parts/file_reader.cc

Index: services/media/framework/parts/file_reader.cc
diff --git a/services/media/framework/parts/file_reader.cc b/services/media/framework/parts/file_reader.cc
index 623e1e41140ec194451dbdc6e553cb86e9526177..4061ecda337357af7792ba4e978a8e2fd6907d8e 100644
--- a/services/media/framework/parts/file_reader.cc
+++ b/services/media/framework/parts/file_reader.cc
@@ -34,14 +34,18 @@ Result FileReader::Init(const GURL& gurl) {
       return Result::kUnsupportedOperation;
     }
   } else {
-    size_ = -1;
+    size_ = kFailed;
   }
 
   return Result::kOk;
 }
 
 size_t FileReader::Read(uint8_t* buffer, size_t bytes_to_read) {
-  return fread(buffer, 1, bytes_to_read, file_);
+  size_t bytes_read = fread(buffer, 1, bytes_to_read, file_);
+  if (bytes_read != bytes_to_read && ferror(file_) != 0) {
+    bytes_read = kFailed;
+  }
+  return bytes_read;
 }
 
 int64_t FileReader::GetPosition() const {