Add onGetUsbPrinterInfoRequested event to printerProvider API.

extensions/browser/api/printer_provider_internal/printer_provider_internal_api.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/browser/api/printer_provider_internal/printer_provider_internal_api.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 68 matching lines @@
 }
 
 void PrinterProviderInternalAPI::NotifyPrintResult(
     const Extension* extension,
     int request_id,
     core_api::printer_provider_internal::PrintError error) {
   FOR_EACH_OBSERVER(PrinterProviderInternalAPIObserver, observers_,
                     OnPrintResult(extension, request_id, error));
 }
 
+void PrinterProviderInternalAPI::NotifyGetUsbPrinterInfoResult(
+    const Extension* extension,
+    int request_id,
+    const core_api::printer_provider::PrinterInfo* printer_info) {
+  FOR_EACH_OBSERVER(
+      PrinterProviderInternalAPIObserver, observers_,
+      OnGetUsbPrinterInfoResult(extension, request_id, printer_info));
+}
+
 PrinterProviderInternalReportPrintResultFunction::
     PrinterProviderInternalReportPrintResultFunction() {
 }
 
 PrinterProviderInternalReportPrintResultFunction::
     ~PrinterProviderInternalReportPrintResultFunction() {
 }
 
 ExtensionFunction::ResponseAction
 PrinterProviderInternalReportPrintResultFunction::Run() {
@@ skipping 132 matching lines @@
   extensions::BlobHolder* holder =
       extensions::BlobHolder::FromRenderProcessHost(
           contents->GetRenderProcessHost());
   holder->HoldBlobReference(blob.Pass());
 
   results_ = internal_api::GetPrintData::Results::Create(info);
   SetTransferredBlobUUIDs(uuids);
   SendResponse(true);
 }
 
+PrinterProviderInternalReportUsbPrinterInfoFunction::
+    PrinterProviderInternalReportUsbPrinterInfoFunction() {
+}
+
+PrinterProviderInternalReportUsbPrinterInfoFunction::
+    ~PrinterProviderInternalReportUsbPrinterInfoFunction() {
+}
+
+ExtensionFunction::ResponseAction
+PrinterProviderInternalReportUsbPrinterInfoFunction::Run() {
+  scoped_ptr<internal_api::ReportUsbPrinterInfo::Params> params(
+      internal_api::ReportUsbPrinterInfo::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+
+  PrinterProviderInternalAPI::GetFactoryInstance()
+      ->Get(browser_context())
+      ->NotifyGetUsbPrinterInfoResult(extension(), params->request_id,
+                                      params->printer_info.get());
+  return RespondNow(NoArguments());
+}
+
 }  // namespace extensions