Add WebUSB bindings and client interface

public/platform/modules/webusb/WebUSBDevice.h

Index: public/platform/modules/webusb/WebUSBDevice.h
diff --git a/public/platform/modules/webusb/WebUSBDevice.h b/public/platform/modules/webusb/WebUSBDevice.h
new file mode 100644
index 0000000000000000000000000000000000000000..b2f674e37d0ee1ab712635a150f44bb519ee8325
--- /dev/null
+++ b/public/platform/modules/webusb/WebUSBDevice.h
@@ -0,0 +1,105 @@
+// 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 WebUSBDevice_h
+#define WebUSBDevice_h
+
+#include "public/platform/WebCallbacks.h"
+#include "public/platform/WebVector.h"
+
+namespace blink {
+
+struct WebUSBDeviceInfo;
+struct WebUSBError;
+struct WebUSBTransferInfo;
+
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceOpenCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceCloseCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceSetConfigurationCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceClaimInterfaceCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceReleaseInterfaceCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceResetCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceSetInterfaceAlternateSettingCallbacks;
+typedef WebCallbacks<void, WebUSBError*> WebUSBDeviceClearHaltCallbacks;
+typedef WebCallbacks<WebUSBTransferInfo*, WebUSBError*> WebUSBDeviceControlTransferCallbacks;
+typedef WebCallbacks<WebUSBTransferInfo*, WebUSBError*> WebUSBDeviceBulkTransferCallbacks;
+typedef WebCallbacks<WebUSBTransferInfo*, WebUSBError*> WebUSBDeviceInterruptTransferCallbacks;
+
+class WebUSBDevice {
+public:
+    enum TransferDirection {
+        TransferDirectionIn,
+        TransferDirectionOut
+    };
+
+    enum RequestType {
+        RequestTypeStandard,
+        RequestTypeClass,
+        RequestTypeVendor,
+    };
+
+    enum RequestRecipient {
+        RequestRecipientDevice,
+        RequestRecipientInterface,
+        RequestRecipientEndpoint,
+        RequestRecipientOther,
+    };
+
+    struct ControlTransferParameters {
+        TransferDirection direction;
+        RequestType type;
+        RequestRecipient recipient;
+        uint8_t request;
+        uint16_t value;
+        uint16_t index;
+    };
+
+    virtual ~WebUSBDevice() { }
+
+    virtual const WebUSBDeviceInfo& info() const = 0;
+
+    // Opens the device.
+    // Ownership of the WebUSBDeviceOpenCallbacks is transferred to the client.
+    virtual void open(WebUSBDeviceOpenCallbacks*) = 0;
+
+    // Closes the device.
+    // Ownership of the WebUSBDeviceCloseCallbacks is transferred to the client.
+    virtual void close(WebUSBDeviceCloseCallbacks*) = 0;
+
+    // Sets the active configuration for the device.
+    // Ownership of the WebUSBDeviceSetConfigurationCallbacks is transferred to the client.
+    virtual void setConfiguration(uint8_t configurationValue, WebUSBDeviceSetConfigurationCallbacks*) = 0;
+
+    // Claims an interface in the active configuration.
+    // Ownership of the WebUSBDeviceClaimInterfaceCallbacks is transferred to the client.
+    virtual void claimInterface(uint8_t interfaceNumber, WebUSBDeviceClaimInterfaceCallbacks*) = 0;
+
+    // Releases a claimed interface.
+    // Ownership of the WebUSBDeviceReleaseInterfaceCallbacks is transferred to the client.
+    virtual void releaseInterface(uint8_t interfaceNumber, WebUSBDeviceReleaseInterfaceCallbacks*) = 0;
+
+    // Sets the alternate setting of an interface.
+    // Ownership of the WebUSBDeviceSetInterfaceAlternateSettingCallbacks is transferred to the client.
+    virtual void setInterface(uint8_t interfaceNumber, uint8_t alternateSetting, WebUSBDeviceSetInterfaceAlternateSettingCallbacks*) = 0;
+
+    // Clears the halt condition on a specific endpoint.
+    // Ownership of the WebUSBDeviceClearHaltCallbacks is transferred to the client.
+    virtual void clearHalt(uint8_t endpointNumber, WebUSBDeviceClearHaltCallbacks*) = 0;
+
+    // Initiates a control transfer.
+    // Ownership of the WebUSBDeviceControlTransferCallbacks is transferred to the client.
+    virtual void controlTransfer(const ControlTransferParameters&, uint8_t* data, size_t dataSize, unsigned timeout, WebUSBDeviceControlTransferCallbacks*) = 0;
+
+    // Initiates a bulk or interrupt transfer.
+    // Ownership of the WebUSBDeviceBulkTransferCallbacks is transferred to the client.
+    virtual void transfer(TransferDirection, uint8_t endpointNumber, uint8_t* data, size_t dataSize, unsigned timeout, WebUSBDeviceBulkTransferCallbacks*) = 0;
+
+    // Resets the device.
+    // Ownership of the WebUSBDeviceResetCallbacks is transferred to the client.
+    virtual void reset(WebUSBDeviceResetCallbacks*) = 0;
+};
+
+} // namespace blink
+
+#endif // WebUSBDevice_h