Moving previews content util to chrome/browser

No point in keep this in components/ if previews is non-ios.
Additionally, for lite page previews, I'd like to include some chrome/
headers in this util file.

Change-Id: I150a6a027ca3a9b0c0e1b24958f0cdd2de7b3d72
Reviewed-on: https://chromium-review.googlesource.com/c/1476109
Commit-Queue: Ryan Sturm <[email protected]>
Reviewed-by: Doug Arnett <[email protected]>
Cr-Commit-Position: refs/heads/master@{#632862}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 36a0ef1..294e455d 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -1296,6 +1296,8 @@
     "prerender/prerender_tab_helper.h",
     "prerender/prerender_util.cc",
     "prerender/prerender_util.h",
+    "previews/previews_content_util.cc",
+    "previews/previews_content_util.h",
     "previews/previews_infobar_delegate.cc",
     "previews/previews_infobar_delegate.h",
     "previews/previews_lite_page_decider.cc",