[Mojo-Loading] Implement URLLoader::SetPriority

content/common/url_loader.mojom

Index: content/common/url_loader.mojom
diff --git a/content/common/url_loader.mojom b/content/common/url_loader.mojom
index 17af152dd8b4b296c2656a335a607fc93d95c9ba..98deb497c3ea1f5fc8a8f30ece6bd497a6ba2ff8 100644
--- a/content/common/url_loader.mojom
+++ b/content/common/url_loader.mojom
@@ -16,12 +16,25 @@ struct URLRequestRedirectInfo;
 [Native]
 struct URLLoaderStatus;
 
+// This enum corresponds to net::RequestPriority. See its comments for details.
+enum RequestPriority {
+  kThrottled = 0,
+  kIdle,
+  kLowest,
+  kLow,
+  kMedium,
+  kHighest
+};
+
 // Destroying a URLLoader will cancel the associated request.
 interface URLLoader {
   // If the associated request has |auto_follow_redirects| set to false,
   // then upon receiving an URLResponse with a non-NULL |redirect_url| field,
   // |FollowRedirect| may be called to load the URL indicated by the redirect.
   FollowRedirect();
+
+  // Sets the request priority.
+  SetPriority(RequestPriority priority, int32 intra_priority_value);

[dcheng, 2017/01/24 19:07:18]

Nit: maybe document what intra_priority_value is? I assume it's used to
prioritize within a given priority level.

[yhirano, 2017/01/27 07:53:55]

I found no document but it looks so according to the implementation.

 };
 
 // Opaque handle passed from the browser process to a child process to manage