Add delete context menu for custom wallpapers and some ui tweaks

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 698e615577ffb4c293c2e9159c898074affcb089..3c310e443d0423e5d8861722422a03d6f2022e4e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -12131,12 +12131,12 @@ Some features may be unavailable.  Please check that the profile exists and you
       </message>
 
       <!-- Wallpaper Manager -->
-      <message name="IDS_WALLPAPER_MANAGER_SEARCH_TEXT_LABEL" desc="Search text field label.">
-        Search backgrounds
-      </message>
       <message name="IDS_WALLPAPER_MANAGER_ALL_CATEGORY_LABEL" desc="Wallpaper category label.">
         All
       </message>
+      <message name="IDS_WALLPAPER_MANAGER_DELETE_COMMAND_LABEL" desc="Wallpaper delete command label.">
+        Delete
+      </message>
       <message name="IDS_WALLPAPER_MANAGER_CUSTOM_CATEGORY_LABEL" desc="Wallpaper category label.">
         Custom
       </message>
@@ -12149,12 +12149,6 @@ Some features may be unavailable.  Please check that the profile exists and you
       <message name="IDS_WALLPAPER_MANAGER_COLOR_LABEL" desc="Custom wallpaper color label.">
         Color:
       </message>
-      <message name="IDS_WALLPAPER_MANAGER_PREVIEW_LABEL" desc="Custom wallpaper preview label.">
-        Preview:
-      </message>
-      <message name="IDS_WALLPAPER_MANAGER_DOWNLOADING_LABEL" desc="Downloading in progress label.">
-        Downloading
-      </message>
       <message name="IDS_WALLPAPER_MANAGER_SHOW_CUSTOM_WALLPAPER_ON_START_WARNING" desc="The string displayed to user when set custom wallpaper">
         Wallpapers appear on the Sign-in Screen.
       </message>