Rename Blob to Bytes

[schmidt-sebastian]

As part of go/firestore-next-amendment-amendment, we decided to rename Blob to Bytes to avoid name clashes with the JavaScript Blob type.

Couple notes:

• I created a new type instead of renaming the export since the error messages would have been incorrect.
• I removed the now incorrect error messages in the new type.
• I believe all of our platforms now support byte conversion (since we have the Polyfill for ReactNative, which was required to make stream resumption work). Hence, I did not port the validation.
• The old Blob type now extends Bytes to make it easier for the serializer to use common logic.

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[google-oss-bot]

Binary Size Report

Affected SDKs

• @firebase/firestore

  Type	Base (96076f0)	Head (9163293)	Diff
  browser	249 kB	250 kB	+682 B (+0.3%)
  esm2017	196 kB	196 kB	+435 B (+0.2%)
  main	476 kB	476 kB	+850 B (+0.2%)
  module	247 kB	247 kB	+647 B (+0.3%)
  react-native	196 kB	196 kB	+442 B (+0.2%)

• @firebase/firestore/exp

  Type	Base (96076f0)	Head (9163293)	Diff
  browser	189 kB	189 kB	-484 B (-0.3%)
  main	468 kB	467 kB	-374 B (-0.1%)
  module	189 kB	189 kB	-484 B (-0.3%)
  react-native	189 kB	189 kB	-340 B (-0.2%)

• @firebase/firestore/lite

  Type	Base (96076f0)	Head (9163293)	Diff
  browser	64.7 kB	64.2 kB	-482 B (-0.7%)
  main	141 kB	141 kB	-460 B (-0.3%)
  module	64.7 kB	64.2 kB	-482 B (-0.7%)
  react-native	64.8 kB	64.5 kB	-352 B (-0.5%)

• @firebase/firestore/memory

  Type	Base (96076f0)	Head (9163293)	Diff
  browser	187 kB	188 kB	+669 B (+0.4%)
  esm2017	147 kB	147 kB	+419 B (+0.3%)
  main	349 kB	350 kB	+850 B (+0.2%)
  module	185 kB	186 kB	+622 B (+0.3%)
  react-native	147 kB	147 kB	+429 B (+0.3%)

• firebase

  Type	Base (96076f0)	Head (9163293)	Diff
  firebase-firestore.js	288 kB	288 kB	+633 B (+0.2%)
  firebase-firestore.memory.js	227 kB	228 kB	+632 B (+0.3%)
  firebase.js	823 kB	823 kB	+634 B (+0.1%)

Test Logs

• Base (96076f0d): https://github.com/firebase/firebase-js-sdk/actions/runs/222860869
• Head (91632936): https://github.com/firebase/firebase-js-sdk/actions/runs/223587131

[google-oss-bot]

Size Analysis Report

Affected Products

No changes between base commit (96076f0) and head commit (9163293).

Test Logs

• Base (96076f0d): https://github.com/firebase/firebase-js-sdk/actions/runs/222860869
• Head (91632936): https://github.com/firebase/firebase-js-sdk/actions/runs/223587131

[thebrianchen]

lgtm! I really tried to find nits, but I couldn't

[thebrianchen]

optional: It might be helpful to add some context in comments about why the main SDK's Blob is extending the Bytes class in the Lite SDK. It's clear to me what's happening when I look at the PR description, but without it, I would be confused.

[schmidt-sebastian]

Done (but missed this before merging - coming in the next PR).