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

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

Index: chrome/browser/extensions/api/dial/dial_device_data.h
diff --git a/chrome/browser/extensions/api/dial/dial_device_data.h b/chrome/browser/extensions/api/dial/dial_device_data.h
index bd9f561bbcf3c3037810a68d39d965c6cb483591..42afbecb9d4ac78123da6c71c2f4ac4b8b5268b9 100644
--- a/chrome/browser/extensions/api/dial/dial_device_data.h
+++ b/chrome/browser/extensions/api/dial/dial_device_data.h
@@ -17,8 +17,8 @@ namespace extensions {
 namespace api {
 namespace dial {
 struct DialDevice;
-}  // namespace api
 }  // namespace dial
+}  // namespace api
 
 // Dial device information that is used within the DialService and Registry on
 // the IO thread. It is updated as new information arrives and a list of
@@ -94,6 +94,18 @@ class DialDeviceData {
   int config_id_;
 };
 
+class DialDeviceDescription {
+ public:
+  DialDeviceDescription() = default;
+  DialDeviceDescription(const std::string& device_description,
+                        const GURL& app_url);
+
+  ~DialDeviceDescription() = default;
+
+  std::string device_description;
+  GURL app_url;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_DEVICE_DATA_H_