Remove extra whitespace in DIR_METADATA files.

Changes were generated by a few lines of bash which I've documented at
http://go/paste/4886211966533632.

Limiting this CL to files in directories that don't set noparent in
OWNERS so it can be done with a small set of reviewers for a large set
of directories. Can do more targetted follow up CLs for the rest.

R=tedchoc

Bug: 1167291
Change-Id: I3ffbc694d284a34cbba1d14f36baecff0216da98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633527
Commit-Queue: Andy Perelson <[email protected]>
Reviewed-by: Ted Choc <[email protected]>
Reviewed-by: John Abd-El-Malek <[email protected]>
Cr-Commit-Position: refs/heads/master@{#844320}
diff --git a/chrome/browser/sessions/DIR_METADATA b/chrome/browser/sessions/DIR_METADATA
index 80992c1..aeaf64b 100644
--- a/chrome/browser/sessions/DIR_METADATA
+++ b/chrome/browser/sessions/DIR_METADATA
@@ -1,3 +1,3 @@
-monorail:  {
-  component:  "UI>Browser>Sessions"
+monorail: {
+  component: "UI>Browser>Sessions"
 }