[PoC] Reformat all BUILD.gn and *.gni files with new gn.

components/html_viewer/BUILD.gn

Index: components/html_viewer/BUILD.gn
diff --git a/components/html_viewer/BUILD.gn b/components/html_viewer/BUILD.gn
index acbcbe9ef849d99cd3144e9a15666868d6ac7d68..57b277201a08e28fb70226d36cd813c3035f718c 100644
--- a/components/html_viewer/BUILD.gn
+++ b/components/html_viewer/BUILD.gn
@@ -164,16 +164,16 @@ source_set("lib") {
     "//components/resource_provider/public/interfaces",
     "//components/scheduler:scheduler",
     "//components/startup_metric_utils/browser",
-    "//components/webcrypto",
     "//components/web_view:switches",
     "//components/web_view/public/interfaces",
+    "//components/webcrypto",
     "//gin",
-    "//gpu/command_buffer/common:gles2_utils",
     "//gpu/blink:blink",
+    "//gpu/command_buffer/common:gles2_utils",
     "//media",
+    "//media:shared_memory_support",
     "//media/blink",
     "//media/mojo",
-    "//media:shared_memory_support",
     "//mojo/application/public/cpp",
     "//mojo/application/public/interfaces",
     "//mojo/common",
@@ -190,9 +190,9 @@ source_set("lib") {
     "//mojo/services/tracing/public/interfaces",
     "//net",
     "//skia",
-    "//third_party/mojo_services/src/accessibility/public/interfaces",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:resources",
+    "//third_party/mojo_services/src/accessibility/public/interfaces",
     "//ui/base:base",
     "//ui/events",
     "//ui/events:gesture_detection",