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

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

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_REGISTRY_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_REGISTRY_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 54 matching lines @@
   // Called by the DIAL API when event listeners are added or removed. The dial
   // service is started after the first listener is added and stopped after the
   // last listener is removed.
   void OnListenerAdded();
   void OnListenerRemoved();
 
   // Called by the DIAL API to try to kickoff a discovery if there is not one
   // already active.
   bool DiscoverNow();
 
+  // Returns the URL of the device description for the device identified by
+  // |label|, or an empty GURL if no such device exists.
+  GURL GetDeviceDescriptionURL(const std::string& label) const;
+
+  // Adds a device directly to the registry as if it was discovered.  For tests
+  // only.  Note that if discovery is actually started, this device will be
+  // removed by PruneExpiredDevices().
+  void AddDeviceForTest(const DialDeviceData& device_data);
+
  protected:
   // Returns a new instance of the DIAL service.  Overridden by tests.
   virtual std::unique_ptr<DialService> CreateDialService();
   virtual void ClearDialService();
 
   // Returns the current time.  Overridden by tests.
   virtual base::Time Now() const;
 
   // The DIAL service. Periodic discovery is active when this is not NULL.
   std::unique_ptr<DialService> dial_;
@@ skipping 95 matching lines @@
                            TestRemovingListenerDoesNotClearList);
   FRIEND_TEST_ALL_PREFIXES(DialRegistryTest, TestNetworkEventConnectionLost);
   FRIEND_TEST_ALL_PREFIXES(DialRegistryTest,
                            TestNetworkEventConnectionRestored);
   DISALLOW_COPY_AND_ASSIGN(DialRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_REGISTRY_H_