adds restart message and link to crash reporting setting

components/breakpad/app/breakpad_win.cc

 // Copyright 2013 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/breakpad/app/breakpad_win.h"
 
 #include <windows.h>
 #include <shellapi.h>
 #include <tchar.h>
 #include <userenv.h>
@@ skipping 577 matching lines @@
 #ifndef _WIN64
     if (process_type != L"browser" &&
         !GetBreakpadClient()->IsRunningUnattended()) {
       // Initialize the hook TerminateProcess to catch unexpected exits.
       InitTerminateProcessHooks();
     }
 #endif
   }
 }
 
+// If the user has disabled crash reporting uploads and restarted Chrome, the
+// restarted instance will still contain the pipe environment variable, which
+// will allow the restarted process to still upload crash reports. This function
+// clears the environment variable, so that the restarted Chrome, which inherits
+// its environment from the current Chrome, will no longer contain the variable.
+extern "C" void __declspec(dllexport) __cdecl
+      ClearBreakpadPipeEnvironmentVariable() {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  env->UnSetVar(kPipeNameVar);
+}
+
 }  // namespace breakpad