[Mojo-Loading] Implement URLLoader::SetPriority

content/common/url_request_struct_traits.cc

Index: content/common/url_request_struct_traits.cc
diff --git a/content/common/url_request_struct_traits.cc b/content/common/url_request_struct_traits.cc
new file mode 100644
index 0000000000000000000000000000000000000000..be0a3e42a1465135c0a57b51a0fa5a231a6fd1d8
--- /dev/null
+++ b/content/common/url_request_struct_traits.cc
@@ -0,0 +1,60 @@
+// Copyright 2017 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.
+
+#include "content/common/url_request_struct_traits.h"
+
+#include "base/logging.h"
+
+namespace mojo {
+
+content::mojom::RequestPriority
+EnumTraits<content::mojom::RequestPriority, net::RequestPriority>::ToMojom(
+    net::RequestPriority priority) {
+  switch (priority) {
+    case net::THROTTLED:
+      return content::mojom::RequestPriority::kThrottled;
+    case net::IDLE:
+      return content::mojom::RequestPriority::kIdle;
+    case net::LOWEST:
+      return content::mojom::RequestPriority::kLowest;
+    case net::LOW:
+      return content::mojom::RequestPriority::kLow;
+    case net::MEDIUM:
+      return content::mojom::RequestPriority::kMedium;
+    case net::HIGHEST:
+      return content::mojom::RequestPriority::kHighest;
+  }
+  NOTREACHED();
+  return static_cast<content::mojom::RequestPriority>(priority);
+}
+
+bool EnumTraits<content::mojom::RequestPriority, net::RequestPriority>::
+    FromMojom(content::mojom::RequestPriority in, net::RequestPriority* out) {
+  switch (in) {
+    case content::mojom::RequestPriority::kThrottled:
+      *out = net::THROTTLED;
+      return true;
+    case content::mojom::RequestPriority::kIdle:
+      *out = net::IDLE;
+      return true;
+    case content::mojom::RequestPriority::kLowest:
+      *out = net::LOWEST;
+      return true;
+    case content::mojom::RequestPriority::kLow:
+      *out = net::LOW;
+      return true;
+    case content::mojom::RequestPriority::kMedium:
+      *out = net::MEDIUM;
+      return true;
+    case content::mojom::RequestPriority::kHighest:
+      *out = net::HIGHEST;
+      return true;
+  }
+
+  NOTREACHED();
+  *out = static_cast<net::RequestPriority>(in);
+  return true;
+}
+
+}  // namespace mojo