Consume Mojo services directly in Blink's WebUSB implementation.

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

Index: third_party/WebKit/Source/modules/webusb/USB.h
diff --git a/third_party/WebKit/Source/modules/webusb/USB.h b/third_party/WebKit/Source/modules/webusb/USB.h
index 8d406a6ec624d1db12fe6ddfcd069eaa26958e4a..ae2c9c93647225d4da51a400210f5ba3d30a838b 100644
--- a/third_party/WebKit/Source/modules/webusb/USB.h
+++ b/third_party/WebKit/Source/modules/webusb/USB.h
@@ -9,20 +9,19 @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
+#include "device/usb/public/interfaces/chooser_service.mojom-blink.h"
+#include "device/usb/public/interfaces/device_manager.mojom-blink.h"
 #include "platform/heap/Handle.h"
-#include "public/platform/modules/webusb/WebUSBClient.h"
 
 namespace blink {
 
 class LocalFrame;
 class ScriptState;
 class USBDeviceRequestOptions;
-class WebUSBDevice;
 
 class USB final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<USB>
-    , public ContextLifecycleObserver
-    , public WebUSBClient::Observer {
+    , public ContextLifecycleObserver {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(USB);
     USING_GARBAGE_COLLECTED_MIXIN(USB);
@@ -32,7 +31,7 @@ public:
         return new USB(frame);
     }
 
-    ~USB() override;
+    virtual ~USB();
 
     // USB.idl
     ScriptPromise getDevices(ScriptState*);
@@ -47,9 +46,9 @@ public:
     // ContextLifecycleObserver overrides.
     void contextDestroyed() override;
 
-    // WebUSBClient::Observer overrides.
-    void onDeviceConnected(WebPassOwnPtr<WebUSBDevice>) override;
-    void onDeviceDisconnected(WebPassOwnPtr<WebUSBDevice>) override;
+    device::usb::blink::DeviceManager* deviceManager() const { return m_deviceManager.get(); }

[esprehn, 2016/04/06 20:10:45]

did these get renamed from ::wtf at some point?

+
+    void onDeviceChanges(device::usb::blink::DeviceChangeNotificationPtr);
 
     DECLARE_VIRTUAL_TRACE();
     EAGERLY_FINALIZE();
@@ -57,7 +56,8 @@ public:
 private:
     explicit USB(LocalFrame& frame);
 
-    WebUSBClient* m_client;
+    device::usb::blink::DeviceManagerPtr m_deviceManager;
+    device::usb::blink::ChooserServicePtr m_chooserService;
 };
 
 } // namespace blink