Enable storing last-dispatched exception per-thread.

third_party/crashpad/crashpad/client/crashpad_client_win.cc

Index: third_party/crashpad/crashpad/client/crashpad_client_win.cc
diff --git a/third_party/crashpad/crashpad/client/crashpad_client_win.cc b/third_party/crashpad/crashpad/client/crashpad_client_win.cc
index 7a3d0047a98ae4a9fca483c60135d16fbe550475..586d3feb64aa6d88a01a85b30de3ed889f17a430 100644
--- a/third_party/crashpad/crashpad/client/crashpad_client_win.cc
+++ b/third_party/crashpad/crashpad/client/crashpad_client_win.cc
@@ -22,6 +22,7 @@
 #include <memory>
 
 #include "base/atomicops.h"
+#include "base/debug/activity_tracker.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/scoped_generic.h"
@@ -114,6 +115,15 @@ extern "C" LONG __asan_unhandled_exception_filter(EXCEPTION_POINTERS* info);
 #endif
 
 LONG WINAPI UnhandledExceptionHandler(EXCEPTION_POINTERS* exception_pointers) {
+  // Store the event in persistent tracking data.

[manzagop (departed), 2017/03/20 14:29:55]

Perhaps add a "// DO NOT SUBMIT" to be safe.

[bcwhite, 2017/03/21 12:25:06]

Does that actually do anything to prevent it going through the CQ?  I've added
such in the past to keep me from uploading it (usually by having it extend past
80 characters).

[bcwhite, 2017/03/21 12:36:07]

So it does!  chromium_presubmit fails.  Good to know.

+  base::debug::GlobalActivityTracker* tracker =
+      base::debug::GlobalActivityTracker::Get();
+  if (tracker) {
+    tracker->SetProcessPhase(
+        base::debug::GlobalActivityTracker::PROCESS_UNHANDLED_EXCEPTION);
+    tracker->RecordException(nullptr);
+  }
+
 #if defined(ADDRESS_SANITIZER)
   // In ASan builds, delegate to the ASan exception filter.
   LONG status = __asan_unhandled_exception_filter(exception_pointers);