Reformat all gn files in /chrome/browser/resources/media.

`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.

R=mlamouri@chromium.org

Bug: 1041419
Change-Id: I1e8cfb997b358a1adeb39f2b4d6e5aaa5a1d8d5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1998173
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#731663}

chrome/browser/resources/media/mei_preload/BUILD.gn

@@ -12,17 +12,13 @@ mei_preload_out_dir = "MEIPreload"
 copy("component") {
   sources = mei_preload_sources
 
-  outputs = [
-    "$root_out_dir/$mei_preload_out_dir/{{source_file_part}}",
-  ]
+  outputs = [ "$root_out_dir/$mei_preload_out_dir/{{source_file_part}}" ]
 }
 
 if (is_mac) {
   bundle_data("component_bundle") {
     sources = mei_preload_sources
 
-    outputs = [
-      "{{bundle_contents_dir}}/Libraries/$mei_preload_out_dir/{{source_file_part}}",
-    ]
+    outputs = [ "{{bundle_contents_dir}}/Libraries/$mei_preload_out_dir/{{source_file_part}}" ]
   }
 }