Adding support for sampling crashes in Chrome on Windows.

components/crash/content/app/crashpad.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 "components/crash/content/app/crashpad.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #if BUILDFLAG(ENABLE_KASKO)
@@ skipping 277 matching lines @@
 #if defined(OS_WIN)
 void InitializeCrashpadWithEmbeddedHandler(bool initial_client,
                                            const std::string& process_type) {
   InitializeCrashpadImpl(initial_client, process_type, true);
 }
 #endif  // OS_WIN
 
 void SetUploadsEnabled(bool enable_uploads) {
   if (g_database) {
     crashpad::Settings* settings = g_database->GetSettings();
-    settings->SetUploadsEnabled(enable_uploads);
+    settings->SetUploadsEnabled(
+        enable_uploads && GetCrashReporterClient()->GetCollectStatsInSample());
   }
 }
 
 bool GetUploadsEnabled() {
   if (g_database) {
     crashpad::Settings* settings = g_database->GetSettings();
     bool enable_uploads;
     if (settings->GetUploadsEnabled(&enable_uploads)) {
       return enable_uploads;
     }
@@ skipping 144 matching lines @@
 }
 
 #endif  // BUILDFLAG(ENABLE_KASKO)
 
 }  // namespace crash_reporter
 
 #if defined(OS_WIN)
 
 extern "C" {
 
+// This function is used in chrome_metrics_services_manager_client.cc to trigger
+// changes to if crash uploads are enabled.

[Mark Mentovai, 2016/08/11 18:32:25]

trigger changes to the upload-enabled state

[jwd, 2016/08/11 21:41:03]

Done.

+void __declspec(dllexport) __cdecl SetUploadsEnabledImpl(bool enable_uploads) {
+  crash_reporter::SetUploadsEnabled(enable_uploads);
+}
+
 // NOTE: This function is used by SyzyASAN to annotate crash reports. If you
 // change the name or signature of this function you will break SyzyASAN
 // instrumented releases of Chrome. Please contact syzygy-team@chromium.org
 // before doing so! See also http://crbug.com/567781.
 void __declspec(dllexport) __cdecl SetCrashKeyValueImpl(const wchar_t* key,
                                                         const wchar_t* value) {
   crash_reporter::SetCrashKeyValue(base::UTF16ToUTF8(key),
                                    base::UTF16ToUTF8(value));
 }
 
 void __declspec(dllexport) __cdecl ClearCrashKeyValueImpl(const wchar_t* key) {
   crash_reporter::ClearCrashKey(base::UTF16ToUTF8(key));
 }
 
 }  // extern "C"
 
 #endif  // OS_WIN