Fixing names of password_manager kEnableManualFallbacksFilling feature.

Fixing  names of password_manager kEnableManualFallbacksFilling feature
as per the naming convention.

Bug: 785953
Change-Id: I4a4baa1649fe9f02c3783a5e4c40bc75e717cc03
Reviewed-on: https://chromium-review.googlesource.com/900566
Reviewed-by: Vaclav Brozek <vabr@chromium.org>
Commit-Queue: NIKHIL SAHNI <nikhil.sahni@samsung.com>
Cr-Commit-Position: refs/heads/master@{#534923}
base::string16 GetHumanReadableRealm(const std::string& signon_realm) {
  FacetURI maybe_facet_uri(FacetURI::FromPotentiallyInvalidSpec(signon_realm));
  if (maybe_facet_uri.IsValidAndroidFacetURI())
    return base::UTF8ToUTF16("android://" +
                             maybe_facet_uri.android_package_name() + "/");
  return base::UTF8ToUTF16(signon_realm);
}

base::string16 GetHumanReadableRealm(const std::string& signon_realm) {
  FacetURI maybe_facet_uri(FacetURI::FromPotentiallyInvalidSpec(signon_realm));
  if (maybe_facet_uri.IsValidAndroidFacetURI())
    return base::UTF8ToUTF16("android://" +
                             maybe_facet_uri.android_package_name() + "/");
  return base::UTF8ToUTF16(signon_realm);
}
