[omnibox] [rich-autocompletion] Unelide omnibox before setting focus.

With the 1-line UI, rich autocompletion adds a label adjacent to the
omnibox and then resizes the two as the autocompletion length changes.

On location bar focus, the omnibox is unelided; e.g. google.com is
unelided to https://www.google.com.

Before this CL, unelision occurs *after* the location bar is given focus
and its layout computed.

With this CL, unelision occurs *before* the location bar is given focus
so that it can reserve sufficient width for the unelided URL when
updating its layout.

Bug: 1062446
Change-Id: Id78d635255de69d9af97a5589a9e001eee3d0feb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2304666
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789698}

chrome/browser/ui/views/location_bar/location_bar_view.cc

@@ -375,16 +375,16 @@ void LocationBarView::SelectAll() {
 void LocationBarView::FocusLocation(bool is_user_initiated) {
   const bool omnibox_already_focused = omnibox_view_->HasFocus();
 
+  if (is_user_initiated)
+    omnibox_view()->model()->Unelide();
+
   omnibox_view_->SetFocus(is_user_initiated);
 
   if (omnibox_already_focused)
     omnibox_view()->model()->ClearKeyword();
 
-  if (!is_user_initiated)
-    return;
-
-  omnibox_view_->SelectAll(true);
-  omnibox_view()->model()->Unelide();
+  if (is_user_initiated)
+    omnibox_view_->SelectAll(true);
 }
 
 void LocationBarView::Revert() {