Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

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

Index: third_party/WebKit/Source/modules/webusb/USB.cpp
diff --git a/third_party/WebKit/Source/modules/webusb/USB.cpp b/third_party/WebKit/Source/modules/webusb/USB.cpp
index 3bd8b8fc2ed3e2bf0c951120c0da1548f8850d94..7863b6f80015211fce5af8b6bf679cdcfadfd065 100644
--- a/third_party/WebKit/Source/modules/webusb/USB.cpp
+++ b/third_party/WebKit/Source/modules/webusb/USB.cpp
@@ -143,14 +143,14 @@ void USB::contextDestroyed()
     m_client = nullptr;
 }
 
-void USB::onDeviceConnected(WebPassOwnPtr<WebUSBDevice> device)
+void USB::onDeviceConnected(std::unique_ptr<WebUSBDevice> device)
 {
-    dispatchEvent(USBConnectionEvent::create(EventTypeNames::connect, USBDevice::create(device.release(), getExecutionContext())));
+    dispatchEvent(USBConnectionEvent::create(EventTypeNames::connect, USBDevice::create(adoptPtr(device.release()), getExecutionContext())));
 }
 
-void USB::onDeviceDisconnected(WebPassOwnPtr<WebUSBDevice> device)
+void USB::onDeviceDisconnected(std::unique_ptr<WebUSBDevice> device)
 {
-    dispatchEvent(USBConnectionEvent::create(EventTypeNames::disconnect, USBDevice::create(device.release(), getExecutionContext())));
+    dispatchEvent(USBConnectionEvent::create(EventTypeNames::disconnect, USBDevice::create(adoptPtr(device.release()), getExecutionContext())));
 }
 
 DEFINE_TRACE(USB)