Ts** are not declared

[gorohash]

The following classes and methods used in soyutils_usegoog.js are not declared anywhere.

• TsSafeHtml
• TsSafeScript
• TsSafeUrl
• TsTrustedResourceUrl
• TsSafeStyle
• TsSafeStyleSheet
• methods in tsSafeUnwrappers

[teppeis]

Introduced in e001d86.
Those parts are surrounded by // MOE:begin_strip and // MOE:end_strip.
Probably they should have been removed during the build process, but they were left in place.