Reformat all gn files in /ios/chrome/browser/ui/tab_grid/grid.

`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=marq@chromium.org

Bug: 1041419
Change-Id: I496244536e4d0b7bc5261518276512b5adb14110
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1994451
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732694}

ios/chrome/browser/ui/tab_grid/grid/BUILD.gn

@@ -51,9 +51,7 @@ source_set("grid_ui") {
 source_set("unit_tests") {
   testonly = true
 
-  sources = [
-    "grid_view_controller_unittest.mm",
-  ]
+  sources = [ "grid_view_controller_unittest.mm" ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 

ios/chrome/browser/ui/tab_grid/grid/resources/BUILD.gn

@@ -13,13 +13,9 @@ imageset("grid_cell_close_button") {
 }
 
 colorset("grid_theme_selection_tint_color") {
-  sources = [
-    "grid_theme_selection_tint_color.colorset/Contents.json",
-  ]
+  sources = [ "grid_theme_selection_tint_color.colorset/Contents.json" ]
 }
 
 colorset("grid_theme_dark_selection_tint_color") {
-  sources = [
-    "grid_theme_dark_selection_tint_color.colorset/Contents.json",
-  ]
+  sources = [ "grid_theme_dark_selection_tint_color.colorset/Contents.json" ]
 }