Bind `this` to `window` in the UMD wrapper - `goog.global` in `goog/base.js` is assigned `this`. Since `this` becomes `undefined` in strict mode, we need to bind `this` to `window` explicitly.
Bind `this` to `window` in the UMD wrapper
- `goog.global` in `goog/base.js` is assigned `this`. Since `this` becomes `undefined` in strict mode, we need to bind `this` to `window` explicitly.

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