[Overlay][TTS] Fix RTL position of open-tab icon.

Fixes the positioning of the open-in-tab icon in the new layout.

BUG=1016976

Change-Id: I8d632200063ba35076af140321d8e14d9be53a3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888400
Auto-Submit: Donn Denman <donnd@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710983}

chrome/browser/android/compositor/layer/overlay_panel_layer.cc

@@ -292,7 +292,9 @@ void OverlayPanelLayer::SetProperties(
     float spacing_between_icons = 2 * bar_margin_side;
     float margin_from_close_icon = close_icon_width + spacing_between_icons;
     if (is_rtl) {
-      open_tab_left = close_icon_left + margin_from_close_icon;
+      open_tab_left = close_icon_resource_id_ == kInvalidResourceID
+                          ? close_icon_left
+                          : close_icon_left + margin_from_close_icon;
     } else {
       open_tab_left = close_icon_left - margin_from_close_icon;
     }