Reformat all gn files in /chrome/browser/net.

`gn format` recently changed its formatting behavior
for deps, source, and a few other elements when they
are assigned (with =) single-element lists to be consistent
with the formatting of updates (with +=) with single-element.

Now that we've rolled in a GN binary with the change,
reformat all files so that people don't get presubmit
warnings due to this.

This CL was uploaded by git cl split.

[email protected]

Bug: 1041419
Change-Id: I36a069f97ef7b87147c95caeab6ee57fda0f9443
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1994075
Auto-Submit: Nico Weber <[email protected]>
Reviewed-by: Matt Menke <[email protected]>
Commit-Queue: Matt Menke <[email protected]>
Cr-Commit-Position: refs/heads/master@{#730566}
diff --git a/chrome/browser/net/BUILD.gn b/chrome/browser/net/BUILD.gn
index fb244ad..0a05d77 100644
--- a/chrome/browser/net/BUILD.gn
+++ b/chrome/browser/net/BUILD.gn
@@ -5,7 +5,5 @@
 import("//third_party/protobuf/proto_library.gni")
 
 proto_library("probe_message_proto") {
-  sources = [
-    "probe_message.proto",
-  ]
+  sources = [ "probe_message.proto" ]
 }