Reformat all gn files in /third_party/blink/renderer/modules.

`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: I7cf01fd713eecdf0509185d87258fbb1d8a04a82
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1998296
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@{#731658}

third_party/blink/renderer/modules/BUILD.gn

@@ -482,21 +482,15 @@ jumbo_source_set("unit_tests") {
 }
 
 group("accessibility_unittests_data") {
-  data = [
-    "accessibility/testing/data/",
-  ]
+  data = [ "accessibility/testing/data/" ]
 }
 
 group("mediastream_unittests_data") {
-  data = [
-    "//media/test/data/",
-  ]
+  data = [ "//media/test/data/" ]
 }
 
 fuzzer_test("web_app_manifest_fuzzer") {
-  sources = [
-    "manifest/manifest_fuzzer.cc",
-  ]
+  sources = [ "manifest/manifest_fuzzer.cc" ]
 
   dict = "manifest/manifest_fuzzer.dict"
   seed_corpus = "manifest/fuzzer_seed_corpus"
@@ -509,9 +503,7 @@ fuzzer_test("web_app_manifest_fuzzer") {
 
 if (use_libfuzzer) {
   fuzzer_test("media_capabilities_fuzzer") {
-    sources = [
-      "media_capabilities/media_capabilities_fuzzer.cc",
-    ]
+    sources = [ "media_capabilities/media_capabilities_fuzzer.cc" ]
 
     seed_corpus = "media_capabilities/fuzzer_seed_corpus"