[fuchsia] Create hardware video encoder.

Create FuchsiaVideoEncodeAccelerator, which lives on the GPU process
and communicates via MojoVideoEncodeAccelerator.

Create a dedicated IO thread in GpuServiceImpl for Fuchsia VEA, as
FIDL communication does not currently work on ThreadPool's worker
threads.

It is guarded behind the feature FuchsiaMediacodecVideoEncoder,
and requires fuchsia.mediacodec.CodecFactory capability in the GPU
process to work.


Bug: 1321960, 1373289
Change-Id: Ia93985d4e98bed31e3fafc48a65aac7f12c078ac
Fuchsia-Binary-Size: Size increase is unavoidable for large class.
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3936404
Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: David Song <wintermelons@google.com>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Will Cassella <cassew@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072034}
16 files changed
tree: d0f9bce8ec36cdcfeed2cef605b4ba7b42cfdf9a
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. DIR_METADATA
  68. ENG_REVIEW_OWNERS
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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