Add USBConnectionEvent to webusb module.

This is the object passed to onconnected and ondisconnected event
handlers connected to navigator.usb.

BUG=492204

Review URL: https://codereview.chromium.org/1307483002

git-svn-id: svn://svn.chromium.org/blink/trunk@200935 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt

@@ -5503,6 +5503,9 @@ interface USBConfiguration
     getter configurationValue
     getter interfaces
     method constructor
+interface USBConnectionEvent
+    getter device
+    method constructor
 interface USBDevice
     getter configurations
     getter deviceClass

third_party/WebKit/Source/modules/modules.gypi

@@ -294,6 +294,7 @@
       'webusb/USBAlternateInterface.idl',
       'webusb/USBEndpoint.idl',
       'webusb/USBConfiguration.idl',
+      'webusb/USBConnectionEvent.idl',
       'webusb/USBDevice.idl',
       'webusb/USBInterface.idl',
     ],
@@ -474,6 +475,7 @@
       'webmidi/MIDIMessageEventInit.idl',
       'webmidi/MIDIOptions.idl',
       'websockets/CloseEventInit.idl',
+      'webusb/USBConnectionEventInit.idl',
       'webusb/USBDeviceRequestOptions.idl',
       'webusb/USBDeviceFilter.idl',
     ],
@@ -615,6 +617,8 @@
       '<(blink_modules_output_dir)/webmidi/MIDIOptions.h',
       '<(blink_modules_output_dir)/websockets/CloseEventInit.cpp',
       '<(blink_modules_output_dir)/websockets/CloseEventInit.h',
+      '<(blink_modules_output_dir)/webusb/USBConnectionEventInit.cpp',
+      '<(blink_modules_output_dir)/webusb/USBConnectionEventInit.h',
       '<(blink_modules_output_dir)/webusb/USBDeviceFilter.cpp',
       '<(blink_modules_output_dir)/webusb/USBDeviceFilter.h',
       '<(blink_modules_output_dir)/webusb/USBDeviceRequestOptions.cpp',
@@ -1711,6 +1715,8 @@
       'webusb/USBAlternateInterface.h',
       'webusb/USBConfiguration.cpp',
       'webusb/USBConfiguration.h',
+      'webusb/USBConnectionEvent.cpp',
+      'webusb/USBConnectionEvent.h',
       'webusb/USBController.cpp',
       'webusb/USBController.h',
       'webusb/USBDevice.cpp',

third_party/WebKit/Source/modules/webusb/USBConnectionEvent.cpp

+// 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 "config.h"
+#include "modules/webusb/USBConnectionEvent.h"
+
+#include "modules/webusb/USBConnectionEventInit.h"
+#include "modules/webusb/USBDevice.h"
+
+namespace blink {
+
+USBConnectionEvent* USBConnectionEvent::create(const AtomicString& type, const USBConnectionEventInit& initializer)
+{
+    return new USBConnectionEvent(type, initializer);
+}
+
+USBConnectionEvent* USBConnectionEvent::create(const AtomicString& type, USBDevice* device)
+{
+    return new USBConnectionEvent(type, device);
+}
+
+USBConnectionEvent::USBConnectionEvent(const AtomicString& type, const USBConnectionEventInit& initializer)
+    : Event(type, initializer)
+    , m_device(nullptr)
+{
+    if (initializer.hasDevice())
+        m_device = initializer.device();
+}
+
+USBConnectionEvent::USBConnectionEvent(const AtomicString& type, USBDevice* device)
+    : Event(type, false, false)
+    , m_device(device)
+{
+}
+
+DEFINE_TRACE(USBConnectionEvent)
+{
+    visitor->trace(m_device);
+    Event::trace(visitor);
+}
+
+} // namespace blink

third_party/WebKit/Source/modules/webusb/USBConnectionEvent.h

+// 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.
+
+#ifndef USBConnectionEvent_h
+#define USBConnectionEvent_h
+
+#include "modules/EventModules.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class USBConnectionEventInit;
+class USBDevice;
+
+class USBConnectionEvent final : public Event {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static USBConnectionEvent* create(const AtomicString& type, const USBConnectionEventInit&);
+    static USBConnectionEvent* create(const AtomicString& type, USBDevice*);
+
+    USBConnectionEvent(const AtomicString& type, const USBConnectionEventInit&);
+    USBConnectionEvent(const AtomicString& type, USBDevice*);
+
+    USBDevice* device() const { return m_device; }
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    PersistentWillBeMember<USBDevice> m_device;
+};
+
+} // namespace blink
+
+#endif // USBConnectionEvent_h

third_party/WebKit/Source/modules/webusb/USBConnectionEvent.idl

+// 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.
+
+// http://reillyeon.github.io/webusb/#events
+
+[
+    Constructor(DOMString type, optional USBConnectionEventInit eventInitDict),
+    RuntimeEnabled=WebUSB,
+] interface USBConnectionEvent : Event {
+    readonly attribute USBDevice device;
+};

third_party/WebKit/Source/modules/webusb/USBConnectionEventInit.idl

+// 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.
+
+// http://reillyeon.github.io/webusb/#events
+
+dictionary USBConnectionEventInit : EventInit {
+    USBDevice device;
+};