Run gn format on all BUILD.gn files (gn version 306668)

mojo/public/dart/BUILD.gn

Index: mojo/public/dart/BUILD.gn
diff --git a/mojo/public/dart/BUILD.gn b/mojo/public/dart/BUILD.gn
index 4707aa269b60979406d8dca7afd02c2231fab59b..9c8a8a0b6d9c97a811c89fe8d2926b5101272597 100644
--- a/mojo/public/dart/BUILD.gn
+++ b/mojo/public/dart/BUILD.gn
@@ -10,7 +10,6 @@ group("dart") {
   ]
 }
 
-
 group("core") {
   deps = [
     ":mojo_dart_core",
@@ -18,9 +17,8 @@ group("core") {
   ]
 }
 
-
 shared_library("mojo_dart_core") {
-  defines = ["DART_SHARED_LIB"]
+  defines = [ "DART_SHARED_LIB" ]
   sources = [
     "src/mojo_dart_core.cc",
   ]
@@ -34,20 +32,18 @@ shared_library("mojo_dart_core") {
   ]
 }
 
-
 copy("copy_core_library") {
   sources = [
     "$root_out_dir/libmojo_dart_core.so",
   ]
   outputs = [
-    "$root_out_dir/gen/mojo/public/dart/src/libmojo_dart_core.so"
+    "$root_out_dir/gen/mojo/public/dart/src/libmojo_dart_core.so",
   ]
-  deps =[
-    ":mojo_dart_core"
+  deps = [
+    ":mojo_dart_core",
   ]
 }
 
-
 copy("bindings") {
   sources = [
     "bindings.dart",
@@ -66,6 +62,6 @@ copy("bindings") {
     "src/types.dart",
   ]
   outputs = [
-    "{{source_gen_dir}}/{{source_file_part}}"
+    "{{source_gen_dir}}/{{source_file_part}}",
   ]
-}
+}