Include USB printers in printer list as "provisional" devices.

extensions/common/api/printer_provider/usb_printer_manifest_data.cc

 // 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 "extensions/common/api/printer_provider/usb_printer_manifest_data.h"
 
 #include "base/strings/utf_string_conversions.h"
+#include "device/usb/usb_device.h"
 #include "device/usb/usb_device_filter.h"
 #include "extensions/common/api/extensions_manifest_types.h"
 #include "extensions/common/manifest_constants.h"
 
+using device::UsbDeviceFilter;
+
 namespace extensions {
 
 UsbPrinterManifestData::UsbPrinterManifestData() {
 }
 
 UsbPrinterManifestData::~UsbPrinterManifestData() {
 }
 
 // static
 const UsbPrinterManifestData* UsbPrinterManifestData::Get(
     const Extension* extension) {
   return static_cast<UsbPrinterManifestData*>(
       extension->GetManifestData(manifest_keys::kUsbPrinters));
 }
 
 // static
 scoped_ptr<UsbPrinterManifestData> UsbPrinterManifestData::FromValue(
     const base::Value& value,
     base::string16* error) {
   scoped_ptr<core_api::extensions_manifest_types::UsbPrinters> usb_printers =
       core_api::extensions_manifest_types::UsbPrinters::FromValue(value, error);
   if (!usb_printers) {
     return nullptr;
   }
 
   scoped_ptr<UsbPrinterManifestData> result(new UsbPrinterManifestData());
   for (const auto& input : usb_printers->filters) {
     DCHECK(input.get());
-    device::UsbDeviceFilter output;
+    UsbDeviceFilter output;
     output.SetVendorId(input->vendor_id);
     if (input->product_id && input->interface_class) {
       *error = base::ASCIIToUTF16(
           "Only one of productId or interfaceClass may be specified.");
       return nullptr;
     }
     if (input->product_id) {
       output.SetProductId(*input->product_id);
     }
     if (input->interface_class) {
       output.SetInterfaceClass(*input->interface_class);
       if (input->interface_subclass) {
         output.SetInterfaceSubclass(*input->interface_subclass);
         if (input->interface_protocol) {
           output.SetInterfaceProtocol(*input->interface_protocol);
         }
       }
     }
     result->filters_.push_back(output);
   }
   return result.Pass();
 }
 
+bool UsbPrinterManifestData::SupportsDevice(
+    const scoped_refptr<device::UsbDevice>& device) const {
+  return UsbDeviceFilter::MatchesAny(device, filters_);
+}
+
 }  // namespace extensions