Reland "[fetch] upload streaming basic implementation under flag"

This CL relands the patch crrev.com/c/2172724, which was reverted
as crrev.com/c/2224218 due to
1. linux-blink-cors-rel failure
2. http/tests/loading/bad-server-subframe.html failing on mac bots

I fixed #1 by updating FlagExpectations/disable-features=OutOfBlinkCors.
For #2, it is reported flaky:
https://analysis.chromium.org/p/chromium/flake-portal/flakes/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyTwsSBUZsYWtlIkRjaHJvbWl1bUBibGlua193ZWJfdGVzdHNAaHR0cC90ZXN0cy9sb2FkaW5nL2JhZC1zZXJ2ZXItc3ViZnJhbWUuaHRtbAw
(guessed crrev.com/c/2219088 the culprit). Now this CL passes the bots.

Bug: 688906
Cq-Include-Trybots: chromium/try:mac10.10-blink-rel,mac10.11-blink-rel
Change-Id: I9d64f917014096f79b224369fc719e9743086b45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2226103
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774418}
27 files changed
tree: f03f3dc48c8ce8ef82c29c193d03246b827c5b1e
  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. cloud_print/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .vpython
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. DEPS
  66. ENG_REVIEW_OWNERS
  67. LICENSE
  68. LICENSE.chromium_os
  69. OWNERS
  70. PRESUBMIT.py
  71. PRESUBMIT_test.py
  72. PRESUBMIT_test_mocks.py
  73. README.md
  74. WATCHLISTS
  75. codereview.settings
README.md

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The project's web site is https://www.chromium.org.

Documentation in the source is rooted in docs/README.md.

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For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.