[M87 merge] weblayer: fixs possible NPE if a11y enabled during Tab creation

If a11y is enabled, then Tab creation may trigger calling some
code paths that assume mBrowser was non-null.

BUG=1136596
TEST=TabPrivateTest.testCreateTabWithAccessibilityEnabledCrashTest

(cherry picked from commit 42745534dcdb1a92f4a3b8ecd52ebae7068a0af9)

Change-Id: I500fd70cb56b7d16c22284acb677c06ec57b536d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461714
Reviewed-by: Bo <[email protected]>
Commit-Queue: Scott Violet <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#815357}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2464053
Reviewed-by: Scott Violet <[email protected]>
Cr-Commit-Position: refs/branch-heads/4280@{#218}
Cr-Branched-From: ea420fb963f9658c9969b6513c56b8f47efa1a2a-refs/heads/master@{#812852}
4 files changed
tree: 850a7888841fbddf988f9c349143d18611af6a32
  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. 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

Logo Chromium

Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web.

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

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

Learn how to Get Around the Chromium Source Code Directory Structure .

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.