ash: enable packed_resources in ash_shell_lib_with_content deps list

Now that we have this target, there is no reason to have it commented
out. This patch fixes the TODO(GYP) in there.

BUG=None
R=sky@chromium.org,brettw@chromium.org

Review URL: https://codereview.chromium.org/1465963002

Cr-Commit-Position: refs/heads/master@{#361021}

ash/BUILD.gn

@@ -273,8 +273,8 @@ static_library("ash_shell_lib_with_content") {
   sources = gypi_values.ash_shell_with_content_lib_sources
 
   deps = [
-    #"//chrome:packed_resources",  TODO(GYP)
     ":ash_shell_lib",
+    "//chrome:packed_resources",
     "//content",
     "//content/shell:content_shell_lib",
     "//skia",