Move UsbService to its own component.

chrome/browser/extensions/api/usb/usb_device_resource.h

Index: chrome/browser/extensions/api/usb/usb_device_resource.h
diff --git a/chrome/browser/extensions/api/usb/usb_device_resource.h b/chrome/browser/extensions/api/usb/usb_device_resource.h
index b959dafd367f09f6f23c551f7b1269c4dc0cc045..f07f2dc6a3f04c43241196f4bc0ed04846ced767 100644
--- a/chrome/browser/extensions/api/usb/usb_device_resource.h
+++ b/chrome/browser/extensions/api/usb/usb_device_resource.h
@@ -12,14 +12,12 @@
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
-#include "chrome/browser/usb/usb_device_handle.h"
 #include "chrome/common/extensions/api/usb.h"
+#include "components/usb_service/usb_device_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/api_resource.h"
 #include "extensions/browser/api/api_resource_manager.h"
 
-class UsbDeviceHandle;
-
 namespace net {
 class IOBuffer;
 }  // namespace net
@@ -30,10 +28,10 @@ namespace extensions {
 class UsbDeviceResource : public ApiResource {
  public:
   UsbDeviceResource(const std::string& owner_extension_id,
-                    scoped_refptr<UsbDeviceHandle> device);
+                    scoped_refptr<usb_service::UsbDeviceHandle> device);
   virtual ~UsbDeviceResource();
 
-  scoped_refptr<UsbDeviceHandle> device() { return device_; }
+  scoped_refptr<usb_service::UsbDeviceHandle> device() { return device_; }
 
   static const content::BrowserThread::ID kThreadId =
       content::BrowserThread::FILE;
@@ -42,7 +40,7 @@ class UsbDeviceResource : public ApiResource {
   friend class ApiResourceManager<UsbDeviceResource>;
   static const char* service_name() { return "UsbDeviceResourceManager"; }
 
-  scoped_refptr<UsbDeviceHandle> device_;
+  scoped_refptr<usb_service::UsbDeviceHandle> device_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDeviceResource);
 };