[chrome.dial] Adds chrome.dial.fetchDeviceDecription API.

chrome/browser/extensions/api/dial/dial_registry.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/dial/dial_registry.h"
 
 #include <memory>
+#include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/dial/dial_api.h"
 #include "chrome/browser/extensions/api/dial/dial_device_data.h"
 #include "chrome/browser/extensions/api/dial/dial_service.h"
@@ skipping 57 matching lines @@
 
 void DialRegistry::OnListenerRemoved() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK_GT(num_listeners_, 0);
   if (--num_listeners_ == 0) {
     VLOG(2) << "Listeners removed; stopping periodic discovery.";
     StopPeriodicDiscovery();
   }
 }
 
+GURL DialRegistry::GetDeviceDescriptionURL(const std::string& label) const {
+  const auto device_it = device_by_label_map_.find(label);
+  if (device_it != device_by_label_map_.end())
+    return device_it->second->device_description_url();
+
+  return GURL();
+}
+
+void DialRegistry::AddDeviceForTest(const DialDeviceData& device_data) {
+  std::unique_ptr<DialDeviceData> test_data =
+      base::MakeUnique<DialDeviceData>(device_data);
+  device_by_label_map_.insert(
+      std::make_pair(device_data.label(), test_data.get()));
+  device_by_id_map_.insert(
+      std::make_pair(device_data.device_id(), std::move(test_data)));
+}
+
 bool DialRegistry::ReadyToDiscover() {
   if (num_listeners_ == 0) {
     dial_api_->OnDialError(DIAL_NO_LISTENERS);
     return false;
   }
   if (NetworkChangeNotifier::IsOffline()) {
     dial_api_->OnDialError(DIAL_NETWORK_DISCONNECTED);
     return false;
   }
   if (NetworkChangeNotifier::IsConnectionCellular(
@@ skipping 233 matching lines @@
     case NetworkChangeNotifier::CONNECTION_BLUETOOTH:
       if (!dial_) {
         VLOG(2) << "Connection detected, restarting discovery.";
         StartPeriodicDiscovery();
       }
       break;
   }
 }
 
 }  // namespace extensions