Delete `//chrome/services/qrcode_generator`.

After go/rusty-qr-code-generator we no longer need a separate service
that delegates QR code generation to a separate process.  Therefore this
CL deletes the `//chrome/services/qrcode_generator` directory.

* `qr_code_generator_pixeltest.cc` has been moved to
  `//chrome/browser/sharing` (as I am not sure if pixel tests are
  supported for `components_browsertests` - this has been discussed in
  https://crrev.com/c/5278872/8#message-5b43795fe4019875ebb87e19e95b49e08947133b).
* Code that draws a QR code into a `SkBitmap` has been moved from
  `//chrome/services/qrcode_generator/qrcode_generator_service_impl.*`
  to `//components/qr_code_generator/bitmap_generator.*`.
* `qrcode_generator.mojom` has been deleted:
    * Bitmap style enums (e.g. `LocatorStyle`) have been moved into
      `//components/qr_code_generator/bitmap_generator.h`
    * Error codes have been moved into
      `//components/qr_code_generator/qr_code_generator.h`
    * Fields of `GenerateQRCodeRequest` have been "splat" into
      parameters of the new `GenerateBitmap` function
    * `GenerateQRCodeResponse` has been replaced with a new
      `QRImage` struct plus `base::expected<QRImage, Error>`
* `QRImageGenerator` class has been deleted and its method
  has been refectored:
    * The method became a free function
    * The result is now returned directly instead of via a callback

This CL is quite big - I appologize.  Splitting this CL into smaller
pieces is a bit difficult, mostly because it seems hard to defining some
types in `.mojom` and some in `.h`.

Bug: 40263739
Change-Id: I39db6f56ad4138d8169e64fc715c10adfc32ca0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5278872
Reviewed-by: Gavin Williams <gavinwill@chromium.org>
Reviewed-by: Peter Williamson <petewil@chromium.org>
Reviewed-by: Adam Langley <agl@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Owners-Override: danakj <danakj@chromium.org>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1261280}

• chrome/browser/DEPS[diff]
• chrome/browser/ash/BUILD.gn[diff]
• chrome/browser/ash/DEPS[diff]
• chrome/browser/ash/login/oobe_quick_start/connectivity/qr_code.cc[diff]
• chrome/browser/ash/shimless_rma/chrome_shimless_rma_delegate.cc[diff]
• chrome/browser/ash/shimless_rma/chrome_shimless_rma_delegate.h[diff]
• chrome/browser/share/BUILD.gn[diff]
• chrome/browser/share/DEPS[diff]
• chrome/browser/share/qr_code_generation_request.cc[diff]
• chrome/browser/share/qr_code_generation_request.h[diff]
• chrome/browser/share/qr_code_generator_pixeltest.cc[Renamed from chrome/services/qrcode_generator/qrcode_generator_service_pixeltest.cc - diff]
• chrome/browser/ui/BUILD.gn[diff]
• chrome/browser/ui/views/DEPS[diff]
• chrome/browser/ui/views/promos/ios_promo_password_bubble.cc[diff]
• chrome/browser/ui/views/qrcode_generator/qrcode_generator_bubble.cc[diff]
• chrome/browser/ui/views/qrcode_generator/qrcode_generator_bubble.h[diff]
• chrome/browser/ui/views/qrcode_generator/qrcode_generator_bubble_unittest.cc[diff]
• chrome/browser/ui/views/webauthn/authenticator_qr_sheet_view.cc[diff]
• chrome/services/qrcode_generator/BUILD.gn[Deleted - diff]
• chrome/services/qrcode_generator/DEPS[Deleted - diff]
• chrome/services/qrcode_generator/DIR_METADATA[Deleted - diff]
• chrome/services/qrcode_generator/OWNERS[Deleted - diff]
• chrome/services/qrcode_generator/public/cpp/BUILD.gn[Deleted - diff]
• chrome/services/qrcode_generator/public/cpp/qrcode_generator_service.cc[Deleted - diff]
• chrome/services/qrcode_generator/public/cpp/qrcode_generator_service.h[Deleted - diff]
• chrome/services/qrcode_generator/public/mojom/BUILD.gn[Deleted - diff]
• chrome/services/qrcode_generator/public/mojom/OWNERS[Deleted - diff]
• chrome/services/qrcode_generator/public/mojom/qrcode_generator.mojom[Deleted - diff]
• chrome/services/qrcode_generator/qrcode_generator_service_impl.h[Deleted - diff]
• chrome/test/BUILD.gn[diff]
• chrome/utility/BUILD.gn[diff]
• chrome/utility/DEPS[diff]
• chrome/utility/services.cc[diff]
• chromeos/ash/services/cellular_setup/euicc.cc[diff]
• components/qr_code_generator/BUILD.gn[diff]
• components/qr_code_generator/DEPS[Added - diff]
• components/qr_code_generator/bitmap_generator.cc[Renamed from chrome/services/qrcode_generator/qrcode_generator_service_impl.cc - diff]
• components/qr_code_generator/bitmap_generator.h[Added - diff]
• components/qr_code_generator/qr_code_generator.cc[diff]
• components/qr_code_generator/qr_code_generator.h[diff]
• components/qr_code_generator/qr_code_generator_fuzzer.cc[diff]
• components/qr_code_generator/qr_code_generator_unittest.cc[diff]
• components/qr_code_generator/qr_print.cc[diff]
• docs/security/faq.md[diff]