Persist setup metrics and have Chrome report them during UMA upload.

chrome/installer/setup/installer_crash_reporting.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/installer/setup/installer_crash_reporting.h"
 
 #include <iterator>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 103 matching lines @@
       GoogleUpdateSettings::LoadMetricsClientInfo();
   if (client_info)
     crash_client->SetCrashReporterClientIdFromGUID(client_info->client_id);
   // TODO(grt): A lack of a client_id at this point generally means that Chrome
   // has yet to have been launched and picked one. Consider creating it and
   // setting it here for Chrome to use.
 }
 
 size_t RegisterCrashKeys() {
   const base::debug::CrashKey kFixedKeys[] = {
+#if defined(OS_MACOSX) || defined(OS_WIN)

[grt (UTC plus 2), 2016/02/04 15:36:42]

this file is exclusively OS_WIN, so there's no need for the platform-specific
conditionals here.

[bcwhite, 2016/02/04 21:51:13]

This whole file will not be in the final submit.  It was just necessary for it
to compile due to an incomplete port to CrashPad that is currently being
resolved external to this CL.

[grt (UTC plus 2), 2016/02/08 18:09:18]

Gotcha. That other CL landed, so you should be able to rebase to pick it up now.

[bcwhite, 2016/02/09 21:08:45]

Done.

+    { crash_keys::kMetricsClientId, crash_keys::kSmallSize },
+#else
     { crash_keys::kClientId, crash_keys::kSmallSize },
+#endif
     { kCurrentVersion, crash_keys::kSmallSize },
     { kDistributionType, crash_keys::kSmallSize },
     { kIsMultiInstall, crash_keys::kSmallSize },
     { kIsSystemLevel, crash_keys::kSmallSize },
     { kOperation, crash_keys::kSmallSize },
 
     // This is a Windows registry key, which maxes out at 255 chars.
     // (kMediumSize actually maxes out at 252 chars on Windows, but potentially
     // truncating such a small amount is a fair tradeoff compared to using
     // kLargeSize, which is wasteful.)
@@ skipping 28 matching lines @@
 void SetCurrentVersionCrashKey(const base::Version* current_version) {
   if (current_version) {
     base::debug::SetCrashKeyValue(kCurrentVersion,
                                   current_version->GetString());
   } else {
     base::debug::ClearCrashKey(kCurrentVersion);
   }
 }
 
 }  // namespace installer