Implement break signal for serial api.

extensions/browser/api/serial/serial_api.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_BROWSER_API_SERIAL_SERIAL_API_H_
 #define EXTENSIONS_BROWSER_API_SERIAL_SERIAL_API_H_
 
 #include <string>
 
 #include "device/serial/serial.mojom.h"
@@ skipping 221 matching lines @@
   ~SerialSetControlSignalsFunction() override;
 
   // AsyncApiFunction:
   bool Prepare() override;
   void Work() override;
 
  private:
   scoped_ptr<serial::SetControlSignals::Params> params_;
 };
 
+class SerialSetBreakFunction : public SerialAsyncApiFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("serial.setBreak", SERIAL_SETBREAK)
+  SerialSetBreakFunction();
+
+ protected:
+  ~SerialSetBreakFunction() override;
+
+  // AsyncApiFunction:
+  bool Prepare() override;
+  void Work() override;
+
+ private:
+  scoped_ptr<serial::SetBreak::Params> params_;
+};
+
+class SerialClearBreakFunction : public SerialAsyncApiFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("serial.clearBreak", SERIAL_CLEARBREAK)
+  SerialClearBreakFunction();
+
+ protected:
+  ~SerialClearBreakFunction() override;
+
+  // AsyncApiFunction:
+  bool Prepare() override;
+  void Work() override;
+
+ private:
+  scoped_ptr<serial::ClearBreak::Params> params_;
+};
+
 }  // namespace core_api
 
 }  // namespace extensions
 
 namespace mojo {
 
 template <>
 struct TypeConverter<linked_ptr<extensions::core_api::serial::DeviceInfo>,
                      device::serial::DeviceInfoPtr> {
   static linked_ptr<extensions::core_api::serial::DeviceInfo> Convert(
       const device::serial::DeviceInfoPtr& input);
 };
 
 }  // namespace mojo
 
 #endif  // EXTENSIONS_BROWSER_API_SERIAL_SERIAL_API_H_