Update Crashpad to 1f28a123a4c9449e3d7ddad4ff00dacd366d5216

46f403377367 posix: Add ScopedDIR for managing open directories
ab9c03f8827b win: Promote WinMultiProcessWithTempDir to test/win for
             reuse
9c6d190b9570 linux: Add ScopedPtraceAttach to manage ptrace attachments
fd9f952393ea Fix crashpad_util_test build with GCC after 4b450c813795
e142aa87d663 linux: Fix crashpad_util_test ScopedPtraceAttach.* with the
             Yama LSM
a5d81370beda linux: Use pread64() instead of pread() in ProcessMemory
30385d4e4772 handler: Add user extensibility stream call-out
79425e4d9737 win: Free an old buffer before attempting to allocate a
             resized one
1f28a123a4c9 designdoc: Add description of user data sources

BUG=crashpad:167,crashpad:30

Review-Url: https://codereview.chromium.org/2814043003
Cr-Original-Commit-Position: refs/heads/master@{#464059}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: bcba287825394261983a99443cb1be450de1083c

secondary/third_party/crashpad/crashpad/handler/BUILD.gn

@@ -14,6 +14,8 @@ static_library("handler_lib") {
     "mac/exception_handler_server.h",
     "prune_crash_reports_thread.cc",
     "prune_crash_reports_thread.h",
+    "user_stream_data_source.cc",
+    "user_stream_data_source.h",
     "win/crash_report_exception_handler.cc",
     "win/crash_report_exception_handler.h",
   ]

secondary/third_party/crashpad/crashpad/util/BUILD.gn

@@ -125,6 +125,8 @@ static_library("util") {
     "posix/drop_privileges.h",
     "posix/process_info.h",
     "posix/process_info_mac.cc",
+    "posix/scoped_dir.cc",
+    "posix/scoped_dir.h",
     "posix/scoped_mmap.cc",
     "posix/scoped_mmap.h",
     "posix/signals.cc",