x64-upstream: Rebase to r263160

Patches:
Removed 2 merged patches
Removed 1 ndk patch as we switch to experimental ndk and no longer need
it
Fix 2 issues to build webview and unit tests

Script:
Removed ndk as it's no longer sensitive to us
Investigated unit tests related to breakpad, and they are
breakpad_unittests, content_browsertests and unit_tests