Bug 869836 - Part 1: Use EqualsLiteral instead of `== NS_LITERAL_STRING(...)`. r=ehsan
Bug 869836 - Part 2: Use AppendLiteral instead of `Append(NS_LITERAL_STRING(...))`. r=ehsan
Bug 869836 - Part 3: Use `Append('c')` instead of `AppendLiteral("c")`. r=ehsan
Bug 869836 - Part 4: Use EqualsLiteral instead of `Equals(NS_LITERAL_STRING(...))`. r=ehsan
Bug 869836 - Part 5: Use AssignLiteral instead of Assign where possible. r=ehsan
Bug 869836 - Part 6: Use EqualsLiteral instead of Equals where possible. r=ehsan
Bug 869836 - Part 7: Use AppendLiteral instead of Append where possible. r=ehsan
Bug 869836 - Part 8: Use `Append('c')` instead of `Append("c")`. r=ehsan
Bug 869836 - Part 9: Use AssignLiteral instead of `Assign(NS_LITERAL_STRING(...))`. r=ehsan