chrome://crashes: add a link on CrOS for triggering crash uploading

chromeos/dbus/debug_daemon_client.h

Index: chromeos/dbus/debug_daemon_client.h
diff --git a/chromeos/dbus/debug_daemon_client.h b/chromeos/dbus/debug_daemon_client.h
index 871f8b246d93826beabc26a2071e57fef130761a..fd1da9d8f30099c57b1386fb70be306334df1ccc 100644
--- a/chromeos/dbus/debug_daemon_client.h
+++ b/chromeos/dbus/debug_daemon_client.h
@@ -140,6 +140,9 @@ class CHROMEOS_EXPORT DebugDaemonClient : public DBusClient {
       const std::map<std::string, std::string>& options,
       const TestICMPCallback& callback) = 0;
 
+  // Trigger uploading of crashes.
+  virtual void UploadCrashes() = 0;
+
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via DBusThreadManager::Get().
   static DebugDaemonClient* Create();