Use SharedImages for PPAPI video decode

Before this CL VideoDecoderResource and VideoDecoderShim (via
PepperVideoDecoderHost) would exchange textures using legacy mailbox
system. With this CL we replace it with SharedImages.

Old flow:
* Renderer sends RequestTextures()
* Plugin allocates textures, puts them in a legacy mailbox and sends
  back AssignTextures.
* Renderer will pick a free texture, copy video frame into it and send
  texture id with PictureReady.
* After plugin used texture and don't need it anymore it sends texture
  back with RecyclePicture.
* When renderer doesn't need textures anymore it sends DismissPicture.

New flow:
* Renderer allocates SharedImages whenever it needs them
* Renderer picks free SI, copy video frame into it and sends mailbox
  with SharedImageReady.
* Plugin gets texture id from it using CreateAndTexStorageSharedImage
* After plugin is done with the texture, it deletes it (this deletes
  only plugin view of the texture, SharedImage still exists) and sends
  mailbox back.
* When renderer doesn't need SI anymore it either Destroys it right
  away or waits for plugin to return it first.


Change-Id: I1500de3a2254acf013ef715349df2e2ecb191322
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4741796
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Pilar Molina Lopez <pmolinalopez@chromium.org>
Reviewed-by: Derek Schuff <dschuff@chromium.org>
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Reviewed-by: Andres Calderon Jaramillo <andrescj@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1204238}
8 files changed
tree: a48e7ba03efc24cc476f1e7621b58f7a6eee61e8
  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. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gitmodules
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython3
  62. .yapfignore
  63. ATL_OWNERS
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

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