Update Translate overflow menu divider color for dark theme

Bug: 958491
Change-Id: I03277ad2839d3707decb63804a876efea2c95a92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1604044Reviewed-by: Becky Zhou <huayinz@chromium.org>
Commit-Queue: Sinan Sahin <sinansahin@google.com>
Cr-Commit-Position: refs/heads/master@{#658363}

chrome/android/java/res/layout/translate_menu_item_checked.xml

@@ -41,7 +41,7 @@
         android:id="@+id/menu_item_divider"
         android:layout_width="match_parent"
         android:layout_height="1dp"
-        android:background="@color/translate_overflow_menu_divider_color"
+        android:background="@color/divider_bg_color"
         android:visibility="gone" />
 
 </LinearLayout>

chrome/android/java/res/values/colors.xml

@@ -181,9 +181,6 @@
     <color name="payments_section_edit_background">@color/modern_secondary_color</color>
     <color name="payments_section_chevron">#B2B2B2</color>
 
-    <!-- Translate Infobar colors -->
-    <color name="translate_overflow_menu_divider_color">@color/modern_grey_300</color>
-
     <!-- Other colors -->
     <color name="media_viewer_bg">#000000</color>
     <color name="image_viewer_bg">#0E0E0E</color>